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This report was prepared as an account of work sponsored by an agency of the United SlatesGovernment. Neither the United Stales Government nor any agency thereof, nor any of theiremployees, makes any warranty, express or implied, or assumes any legal liability or responsi-bility for the accuracy, completeness, or usefulness of any information, apparatus, product, orprocess disclosed, or represents that its use would not infringe privately owned rights. Refer-ence herein to any specific commercial product, process, or service by trade name, trademark,manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recom-mendation, or favoring by the United Stales Government or uny agency thereof. The viewsand opinions of authors expressed herein do not necessarily state ur reflect those of theUnited Stales Government or any agency thereof.

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DISCLAIMER

This report was prepared as an account of work sponsored by an agency of the U nuedStates Government. Neither the United States Government nor any agency thereuf.nor any of their employees, nor any of their contractors subcontractors, or theiremployees, makes any warranty, express or implied, or assumes any legal liability orresponsibility for the accuracy, completeness, or usefulness of any information,apparatus, product, or process disclosed, or represents that its use would not infringeprivately owned rights. Reference herein to any specific commercial product, process,or service by trade name, trademark, manufacturer, or otherwise, does not necessarilyconstituteor imply its endorsement, recommendation, or favoring by the United StatesGovernment or any agency, contractor or subcontractor thereof. The views andopinions of authors expressed herein do not necessarily state or reflect those of theUnited States Government or any agency, contractor or subcontractor thereof.

Printed in the United States of AmericaAvailable from

National Technical Information ServiceL'.S Department of Commerce

5285 Port Royal RoadSpringfield. VA 22161

NTIS price codes:Printed Copy: A06: Microfiche Copy: AIM

AGS Experiments - 1985, 1986, and 1987

This report contains:

Page

1. • Experimental Areas Layout

2. • Table of Beam Parameters and Fluxes

3. • Experiment Schedule "as run"

4. • Experiment long range schedule

5. # A listing of experiments by number

11. • Two-page summaries of each experiment begin here, alsoordered by number

113. • Publications of AGS experiments - 1982-1987

This is a fourth edition. Please forward suggestions and changes forfuture editions to:

Division Head, EP&S DivisionBrookhaven National Laboratory

Building 91 IBUpton, New York 11973.

Mr. Rippie Bowman designed the cover. The cutoff date for approved exper-iments to be included in the report was January 1987.

- 111 -

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RUNNING

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L i a t o f E x p e r i m e n t s

CollaborationExperiment Spokesman Experiment Title Page

745 3NL/CERN/Columbia An Improved Test of QED—An ExperimentSachs to Measure Vacuum Polarization in the

3d-3p Transitions in Muonic Heii-im . . . 13

747 BNL/CCNY • A High Statistics Study of $ and <HLindenbaum Production from ir~p and K~p Inter-

actions at 22 GeV/c 15

754 Bell Labs./BNL/William Determination of the Dynamics of& Mary/G. Mason/ Positive Muon Motion in Aluminum . . . . 17Virginia St.

Kossler

766 Columbia/Massachusetts/ Study of iT Production, the S = -3Mexico/Fermi lab System; Search for New Resonances;

Avilez, Knapp, Development of a New Approach to DataKreisler Acquisition and Analyses 19

767 BNL/Houston/Penn St./ Development of a Low Energy AntineutronRice Source and Measurement of np Annihilation

Smith Cross Sections Near NN Threshold . . . . 21

771 BNL/Florida St./Indiana Study of E-raeson Characteristics in

SE Massachusetts iT~p, K~p and pp Interactions 23Chung

773 Brandeis/BNL/Indiana/ Search for S = -1 Dibaryon States in theMIT/Osaka/Houston/ Ap Missing Mass Spectrum Near the JM

Texas/Vassar Threshold in the Reaction d(K~ir~)6p. . . 25Piekarz

774 Houston/BNL/NMex/Vassar Search for I-Hypernuclear Levels inHungerford '•He 27

- 5 -

ExperimentCollaboration

Spokesman Experiment Title Page

776 Columbia/Illinois/ v-Oscillation Experiment at BNL 29J. Hopkins

Lee

777 BNL/Yale/Washington/SIN Search for the Rare Decay ModeZeller K+ + it+u+g- 31

778 Purdue Study of Nuclear Fragments ProducedScharenberg from P-Nucleus Collisions in the

Threshold Region 1 < P < 28 GeV/cUsing a Warm Gas Jet Internal Target . . 33

780 BNL/Yale A Search for the Flavor Changing NeutralSchmidt/Morse Currents K° ->• He and K £ + e+e~ 35

781 BNL/MIT/Houston/ Spin Dependence of the Lambda NucleusCarnegie-Mellon/Vassar Interaction Determined by ObservationNYU of Hypernuclear Gamma Rays 37

Deutsch/May

782 Michigan/BNL/Maryland/ Spin-Spin Effects in Medium and High ?j_Notre Dame/Rice/ Elastic p-p Scattering 39Texas A&M/ETH, Zurich

Krisch

785 BNL/Minnesota/ Single Spin Asymmetry Measurements inSE Mass Inclusive P+P Reactions at 24 GeV/cMakdisi/Shupe at High P ± 41

787 BNL/Princeton/TRIUMF A Study of the Decay K + + T + V V 43Kycia

788 Carnegie-Mellon/BNL/ The Four Fermion Weak Interaction andHouston/N.Mexico/Vassar the Decay of frle and i?He 45

Barnes/Franklin

789 NYU/BNL Search for £ (2 .22 ) Formation in ppSculli Interactions 47

- 6 -


791 UCLA/LANL/Penn/Stanford/ A Study of Very Rare K^ Decays 49Temple/Wm. & Mary

Wojcicki/Cousins/Molzon

793 UC Berkeley Search for Fractionally Charged NucleiPrice in 15A GeV Sulfur-Oxygen Collisions. . . 51

794 Michigan/BNL/Maryland One-Spin Effects in p+p + p+p atNotre Dame/Rice/Texas High-P| 53

A&M/ETH, ZurichKrisch

795 BNL/Houston/Karlsruhe/ Measurement of the Imaginary Part ofN. Mexico/Penn St./Rice the 1=1 NN S-Wave Scattering Length at

Smith Threshold 55

796 Win. & Mary/Virginia USR Experiments on Hydrides, FluctuatingSt./G. Mason/Warwick/ Magnetic Fields in Solids and KnightBNL/CEN-CNRS Grenoble/ Shifts 57Uppsala/Munich/Paris

Kossler

798 BNL/Carnegie-Mellon/ Study of Strangeness in Nuclei by UseFlorida St./Houston/ of the (TT+,K+) Reaction 59LANL/Rutgers/Texas/TRIUMF/Vassar

Peng/Pile

801 San Francisco St./ A Search for Quarks Produced in HeavyLBL/Fermilab/UC Irvine Ion-Mercury Interations 61

Bland

802 BNL/Hiroshima/LBL/MIT/ Studies of Particle Production at ExtremeTokyo and INS/Waseda Saryon Densities in Nuclear CollisionsH^asen/Nagamiya at the AGS 63

804 Indiana/Michigan A Search for Fractional Charge withAhlen/Tarle Heavy Ion Beams at the Brookhaven AGS. . 65

- 7 -

Collaborat ionExperiment Spokesman Experiment Title Page

nxzxzMt

805 Rochester/F.armilab/ A Search for Galactic Axions 67

BNLMelissinos/Halaraa

806 Siegen Nuclear Fragmentation in Heavy IonHeinrich Collisions at 15 GeV/amu 69

808 INP Krakow/Louisiana Interactions of 14.1 GeV/amu Nuclei fromSt./Minnesota 160 to 197Au in Light and HeavyJones Targets 71

810 BNL/CCNY/J.Hopkins/LBL A Search for Quark Matter (QGP) and OtherLindenbaum/Platner New Phenomena Utilizing Heavy Ion

Collisions at the AGS 73

811 Boston/Birmingham/ Radiative Kaon Capture and Hyperon WeakBritish Columbia/KFKI/ Radiative Decay. 75TRIUMF/BNL/Case Western

Roberts/Miller

813 Carnegie-Mellon/BNL/ Search for a Strangeness -2 Dibaryon . . 77Erlangen-Nurnberg/Freiburg/Houston/N.Mexico/Pittsburgh/CEN-Saclay/Vassar

Franklin/Barnes

814 HIM fur Kernforschung Study of Exotic Nuclear States Via(Berlin)/BNL/CERN/LANL/ Coulomb or Diftractive ProjectileSUNY Stony Brook/Tel Excitation 79Aviv/

Braun-Munzinger

815 Jaipur/Washington/LBL/ Study of Particle Production and NuclearMarburg/Lund/Otcawa/ Fragmentation in Collisions of Heavy IonNRC/Jammu/BNL Beams with Emulsion Nuclei 81

Otterlund/Karant

816 Boston/BNL/CERN/LPNHE Search for Neutrino Oscillations . . . . 83Paris

Vannucci

- 8 -


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817 Rice/BNL/Houston/ Polarization Transfer inSE Mass Hyperon Production 85

Bonner/Roberts

818 BNL/Indiana/SE Mass/ Search for a JPC - Exotic HybridRice Meson 87

Chang

819 Iowa St. Electromagnetic Dissociation of 59CO,Hill 8 9Y, and l 9 7Au by 15 GeV/Nucleon 160

and 32S 89

8?0 Brandeis/BNL/Indiana/ Search for s = -1 Dibaryon ResonanceMIT/Osaka/Houston/Texas/ (D ) in the Mass Region (2050-2130) V.eVVassar Using the Reaction %e(K~, ir+)nr\,). . . . 91

Piekarz

821 Boston/BNL/CCNY/ A new Precision Measurement of theColumbia/Cornell/ muon g-2 Value at the Level ofHeidelberg/LANL/Mich/ 0.35 PPM 93Miss/Sheffield/Tokyo/KEK/Riken/Yale

Hughes

825 Oregon St/LBL/BNL/ Radiochemical Studies of Uitra-Phillipps/Oslo/Purdue/ relativistic Nuclear Collisions 95Studsvik

Loveland

826 Saga/Frankfurt/Tohoku/ Exclusive Experiment of High EnergyNagoya/Osaka Nuclear Reactions 97

It oh

828 LANL/William & Mary/ Search for n-Mesic Nucleus with theG.Mason/Rugters/Houston/ U + ,P) Reaction at 0.85 GeV/c 99Vassar/Virginia State

Liu/Funsten/Chrien

829 Houston/Brandeis/BNL/ Search for S = -1 Three Body BoundMIT/Osaka/Texas/Vassar System 101

Kishimoto

- 9 -

Collaboration 'Experiment Spokesman Experiment Title Page

831 INS.Tokyo/Yokoyama/Kobe/BNL

Shida

834 BNL/Minnesota/SE Massachusetts

Carrol1/Heppelmann

835 Tel Aviv/BNLPiasetzky/Chrien

836 BNL/Carnegie-Melion/Erlangen-Nurnberg/Freiburg/Kyoto/NewMexico/Pittsburgh/CENSaclay/Vassar

Franklin/Barnes

838 BNL/Minnesota/SE MassBunce/Russell

Search for the Hypernuclear ProjectileFragments in the Relativistic Heavy-Ion Collision Using and C.nu)sionChamber 103

Study of Hadronic Hard Scattering WaveFunctions Using Quasi Elastic ScatteringInside Nuclei 105

Kaon-Nucleus Total Cross Section Mea-surements and Partial Deconfinementin Nuclei 107

Search for a Strangeness -2 DibaryonUsing a 3He Target 109

90° Exclusives at 6 GeV Ill

- 10 -

S U M M A R I E S

0 F

E X P E R I M E N T S

- 11 -

E7A5

-3s

T=5xlO~~11s

PreviouslyMeasured

2 s

T=10"6s

Proposed

Is

3 5T'T

T=5xlO~12s

k = 8.226 keVk = 9.748 keVk = 10.280 keVl / = 1.520 keV

a

Si (Li) DETECTORS

LASER

BEAM

•He* GAS AT 3 ATMDSPHERES PRESSURE

- 12 -

Status: Complete in 1986

Experiment 745 - An Improved Test of QED - An Experiment to MeasureVacuum Polarization in the 3d-3p Transitions in Muonic Helium

Brookhaven National M. MayLaboratory

CERN and E. ZavattiniColumbia University

Columbia University J. Derdarian, J. French, A.M. Sachs

Spokesman: A. Sachs

Present experiments test vacuum polarization effects in QED to an accu-racy of 0.2 to 0.4%. This experiiu^nt is designed to make an order ofmagnitude improvement in these tests by a precise measurement of 3d-3ptransitions in muonic helium, where the level separation is given almostentirely by the vacuum polarization terras.

The transition between high angular momentum states is selected to avoidthe uncertainties in the r.m.s. charge radius of helium - an uncertaintywhich limits the accuracy of the 2s-2p experiments. However, since thelifetimes in the d and p states are 10" 1 1 to 10~ 1 2 sec, the experimentaltechnique involves inducing transitions with a CO2 laser during the fastinitial cascade and detecting the transitions by an increase in the emis-sion of Kg x-rays.

In order to make a beam of stopping negative rauons at the ACS, the designuses the SREL muon channel at 55 deg from the 28 GeV proton beam. Theflexibility of the AGS accelerator permits the extraction of a shortpulse of protons, producing an intense pulse of stopping muons, which iswell matched to the laser pulse.

- 13 -

LIQUIDHYDROGEN

TARGET

INCIDENTBEAM

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Status: In progress

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Experiment 747 - A High S t a t i s t i c s Study of $ and $$ Productionfrom *~p and K~p Interac t ions at 22 GeV/c

Brookhaven A. Etkin, K.J. Foley, R.S. Longacre, W.A. Love,National T.W. Morris, E.D. Platner, A.C. SaulysLaboratory

Brookhaven National S.J. LindenbaumLaboratory and CityCollege of New York

City College ofNew'York

C.S. Chan, M.A. Kramer, J. Piekarz

Spokesman: S.J. Lindenbaum

This experiment is a continuing search for glueballs in the Zweig sup-pressed reaction tf~p * fyfyn. Three s ta tes have already been found: theg T (2050) , g T , (2300) and gT , ,(235O), a l l with IGJP C = 0+2+ + . If QCD iscorrect and the 0Z1 rule is universa l , these s t a t e s must be produced byat least one glueball and probably three . The gluebal l resonance con-clusion f i t s the unusual s t r ik ing cha rac te r i s t i c s of th i s data [Etkin eta l . , Observation of Three 2+ + Resonances in the Glueball-Enhanced ChannelT"p + $$n. Phys. Le t t . 165B, pp. 217-221 (1985)]. Alternative explana-t ions have been shown to be incorrect and do not f i t the data or both(S . J . Lindenbaum and R.S. Longacre, The Glueball Resonance and Alterna-t ive Explanations of the Reaction ir~p •*• <j>fo. Phys. Le t t . 165B, pp. 202-204 (1985); Lindenbaum, S.J. The Observation and Phenomenology of Glue-b a l l s . Invited Lecture. Superstr ings, Supergravity and Unified The-o r i e s . Tp.e ICTP Series in Theoretical Physics, Vol. 2, pp. 548-593(World Scient if ic Publishing Co., Singapore, 1986)].

- 15 -

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- 16 -


Experiment 754 - Determination of Che Dynamics of Positive MuonMotion in Aluminum

Bell Laboratories

Brookhaven NationalLaboratory

A.T. Fiory, R.P. Minnich

A.N. Goland, Y.C. Jean, K.G. Lynn

College of William and Mary W.J. Kossler

George Mason University W.F. Lankford

Virginia State University C.E. Stronach

Spokesman: W.J. Kossler

The aim of this experiment is a detailed study of positive muon depolar-ization (u+SR) in single crystal and polycrystalline samples of aluminumas a function of temperature and orientation in zero and applied trans-verse magnetic fields. The measurements are intended to discriminatebetween recent models of u+ motional behavior in metals: Anderson local-ization, quantum diffusion, classical diffusion, trapping/detrapping atimpurities and in impurity-induced strain fields. The aluminum will bedoped with various concentrations of Ag, Cu, Ga, In, Mg, Si and Zn impuri-ties, selected in order to vary such parameteres as valence difference,solubility and lattice distortion. Classification of u+ dynamics as afunction of sample state variables is essential to the future use of u+SRin more complicated condensed matter systems.

The well-documented SREL muon channel at the AGS installed for QED Exper-iment #745 provides a unique opportunity for condensed matter researchusing rauons during times when the slowly extracted proton beam is incidenton the D-line production target. The SREL channel with a wedge magnet andpossibly focussing elements tunable for 125 MeV/c muons created a highintensity, high duty factor y+ beam competitive with those found elsewherein the world.

Initial beam studies will use scintillators and wire chambers common tohigh-energy physics experiments. Newly designed and relatively standardapparatus will be used for data taking.

- 17 -

oo

I

SCALEE766 DETECTOR


Experiment 766 - Study of CT Production, the S ™ -3 System;Search for Mew Resonances; Development of a New Approach

to Data Acquisition and Analysis

Nevis Laboratory M. Church, E. Gottschalk, R. Hylton, B. Knapp,Columbia University B. Stern, L. Wiencke

University ofMassachusetts

E. Hartouni, D. Jensen, M. Kreisler, M. Rabin,J. Uribe

University of Mexico C. Avilez, W. Correa, J . Escalona

Fermi lab

Spokesmen:

D. Christian, G. Gutierrez, S. Holmes, J. S t ra i t ,A. Wehmann

C. Avilez, B. Rnapp, M. Kreisler

Since i ts discovery in 1964 by a team of Brookhaven scientists , there hasbeen surprisingly l i t t l e learned about the 7T. In particular some of i tsquantum numbers, spin for example, have never been measured; almost noth-ing is known about i ts production mechanisms; and there have been almostno systematic studies of the S = - 3 system.

A new approach to the problems of event selection, triggering, data ac-quisition, and analysis which exist in the high interaction rate, complextopology environment available at high energy proton machines such as theAGS is being developed. We believe we can solve these problems with aspectrometer uti l izing modern electronics technology which will eventu-ally be capable of efficiently reconstructing with full numerical pre-cision more than 105 complex events per second. This will allow unprece-dented event selectivity and sensitivity to rare phenomena.

In order to develop this technology a study of the Ji~ system is the f i rs tmajor physics goal. We hope to: (1) Develop the on-line hardware pro-cessing technology and (2) Amass a large enough sample of ft" events in npor pp interactions to be able to (a) determine the fi~ spin, (b) measurethe ft" production cross sections in a variety of completely specifiedexclusive final s tates, and (c) search for other !s | = 3 resonances.

In two very short SEB runs, 500 million high multiplicity np interactionsand a similar number of pp interactions were recorded. This large datasample will be analyzed with the hardware processor which has been set-upin the Wide Angle Hall in the CBA complex. In August 1986, the spectrom-eter system was shipped to Fermi lab where the investigation of the had-ronic production of heavy quark states will continue.

- 19 -

E767 SETUPpi

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Experiment 767 - Development of a Low Energy Antineutron Sourceand Measurement of 5p Annihilation Cross Sections Near RN Threshold

BrookhavenNationalLaboratory

Universityof Houston

Pennsylvania StateUniversity

Rice University

•'.I. Lowenstein

M. Furic, E.V. Hungerford, B.W. Mayes, L.S. PinskyL. Tang, Y. Xue

T. Armstrong, A. Hicks, R.A. Lewis, W. Lochstet,B.Y. Oh, G.A. Smith, J. Whitmore

J. Kruk, G.S. Mutchler, W. von Witsch

Spokesman: G.A. Smith

This experiment is concerned with the development of a low energy anti-neutron source and measurement of np annihilation cross section near NNthreshold. The construction of an antineutron beam permits the study ofthe SN interaction at very low energies where dE/dx limits the usefulnessof p beams. Antineutrinos are produced by 500 MeV/c p in the chargeexchange reaction pp + tin. Annihilation (and total) cross sections havebeen measured in the range 100-500 MeV/c antineutron momentum with un-precedented resolution (100 KeV - 6.7 MeV NN mass) and sensitivity veryclose to threshold [see T. Armstrong et al., Phys. Lett. 175B, 383,1986]. No narrow states are observed. A comparison of cross sectionswith predictions based on phenomeno gical potential models or micro-scopic quark models is in progress.

- 21 -

M

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SECONDARY TRIG0 5 n->n+2 (if)n > 4 (k" if p)

OTHERS

Status: In progress

Experiment 771 - Study of E-meson Characteristics in *~p, K~pand pp Interactions

BrookhavenNat ionalLaboratory

Florida StateUniversity

IndianaUniversity

SoutheasternMassachusettsUniversity

Spokesman:

S.U. Chung, R.C. Fernow, H. Kirk, S.D. Protopopescu,D. Weygand, H.J. Willutzki

A. Boehnlein, D. Boehnlein, J.H. Goldman, V. Hagopian,D. Reeves

A. Dzierba, R. Crittenden, T. Marshall, S. Teige,D. Zieminska

Z. Bar-Yam, J. Dowd, W. Kern, E. King, H. Rudnicka

S.U. Chung

The E(1420) was discovered over a decade ago; yet it has remained a rela-tively obscure resonance due mainly to relatively small production crosssections in the conventional channels. Information on its branching ratiosinto KRU and nuir and even i ts spin-parity are so far contradictory. Re-cently, the E meson has taken on an added topical significance after itsobservation in the radiative J/t|j decay. The speculations are that thereare two s ta tes in the E region, a conventional qq meson and a glueballwhich is a bound state of gluons.

The aim of Exp. 771 is to perform a definitive analysis of the E mesons asobserved in IT", K~ and p beams at 6 to 8 GeV/c. It is anticipated thatthe stat is t ics of Che E-meson events in these reactions will be one to twoorders of magnitude better than any that have hitherto been available. Theexperiment is performed at the MPS with a fast-forward R1" trigger augmentedby a multiplicity requirement near the LH_ target.

- 23 -

•IN

Im

0 3 04 SLIT •

KAON SPECTROMETER

S3.-4

PION SPECTROMETER

RANGE HODOSCOPE ( H | . 3 6 )

K~

1F

10 2

1

-r'—

\

4

1/"A

. ^

6 INCH

^ ^ ^ - - L I O U I D D2

i r "

5 -^___VACUUMVFSSEL

Pi

The Hypernuclear Spectrometer and Liquid Deuterium Target with Range Hodoscope.


Experiment 773 •- Search for S=-l Dibaryon State? in the Ap MissingMass Spectrum Near the EN Threshold in the Reaction d(K~if"")Ap

oaMDCOaxxxx)

Brandeis University L. Bensinger, L. Kirsch, H. Piekarz

Brookhaven National S. Bart, R.E. Chrien, P.H. P i le , R.J. SutterLaboratory

Indiana University T. Ward

MassachusettsIns t i t u t e ofTechnology

Osaka University

University ofHouston

M. Deutsch, J. Piekarz

T. Fukuda, T. Shibata

E.V. Hungerford, T. Kishiraoto, B. Mayes,L.S. Pinsky

University of Texas M. Barlet t , G.W. Hoffman

Vassar College R.L. Stearns

Spokesmen: H. Piekarz

This experiment proposes to search for strange dibaryon resonances in theAp missing mass region above the IN threshold. In this region previousexperiments have detected a threshold cusp due to the opening of the TSchannel. But at higher momentum transfers a broader structure appearsunderlining the cusp which may be a predicted S=-l dibaryon resonance.It is proposed to enhance this shoulder relative to the cusp by using arange hodoscope to reject spectator nucleons and events proceedingthrough the £N channel and by choosing the appropriate momentum transferto enhance the reaction. A study of the relative magnitudes of the cuspand shoulder with respect to momentum transfer will be made to determinethe orbital angular momentum of this enhancement.

- 25 -

PROPOSAL14 APRIL

KTTSPECTROMETER ( I )82 P . P i l e (X3913)

NO

Status: In Progress

oaooocoaoaxxxzxxxzxzxxxjKs-L

Experiment 774 - Search for E-Hypemuclear Levels in **He



University ofNew Mexico

Vassar College

F..V. Hungerford, B.W. Mayes, H. Piekarz,L.S. Pinsky

S. Bart, R. Chrien, P. Pile

B. Bassaleck

R. Stearns

Spokesman: E.V. Hungerford

The experiment has observed narrow Z hypernuclear structure in the (K~,•f+) reaction using \L and Li targets at incident momentum of 715 MeV/c.The object of the experiment is to obtain the E-nucleus spin orbit param-eter. The structure in the 12Be is consistent with structure seen ear-lier in the KEK data. The structure in the 7Z data are consistent withthe predicted spectrum, however further analysis is needed to extract theinteraction parameters.

The experiment will also attempt to observe a state in the I hypernuclearsystem (NNpJT) for all particles in the Is shell.

The selectivity model predicts one narrow state to be populated in thisreaction if the level is bound or nearly bound. This state may also benarrow if it lies high in the continuium through a correction to the tin-*• EN conversion channel as postulated by Gal, et al. It is important totest these conclusions in one of the lightest possible systems.

- 27 -

E776

- 28 -


Experiment 776 - v-Oscillation Experiment at BNL

ColumbiaUniversity

University ofIIlinois

Johns HopkinsUniversity

C.Y. Chi, N. Kondakis, W. Lee, B. Rubin, R. Seto,C. Stoughton, G. Tzanakos

E. O'Brien, T. O'Halloran, K. Reardon

B. Blumenfeld, C. Chien, L. Duncan, E. Lincke,L. Lueking, L. Madansky, A. Pevsner

Spokesman: W. Lee

This experiment is designed to search for v + v neutrino oscillation.The sensitivity limits are Am2 = .03 eV2 at full mixing, and sin22a =10"3 at large Am2. The 240 ton detector is a finely segmented EM calo-rimeter using drift tubes and concrete (90 planes) interspersed withscintillators (10 planes), followed by a toroidal magnetic spectrometer.

The detector is located 1 km from the neutrino source. A newly designed,two-horn dichromatic neutrino beam is used at E y = 1.3 GeV for pion neu-trinos and E v = 3 GeV for kaon neutrinos.

This experiment has run during the winter 1984, Summer and Fall 1985.

- 29 -

E777

T

- 30 -

Status: In progress

Experiment 777 - Search for the Rare Decay Mode K+ • t*V*e~


University

University ofWashington

SchweizerishesInstitut furNuklearforschung

T. Erickson, H.A. Gordon, D.M. Lazarus,P. Rehak, M. Tannenbaum

C. Campagnari, P.S. Cooper, N. Hadley, W.D. Herold,A. Lee, M. Zeller

V. Chaloupka, H.J. Lubatti, E. Jagel

J. Egger, W.D. Herold, H. Rasper

Spokesman: M. E. Zeller

This is a proposal to measure the branching ratio of the decay K+ •+ ir+lJ+ewith a statistical sensitivity of 5 x 10~ 1 2 and systematic sensitivity ofbetter than 10"1 . The apparatus involves a high flux, unseparated K +

beam with momentum 6 GeV/c and a spectrometer which measures the momentumand species of all of the final state particles. The beam design is basedon an existing beam modified to reduce the number of ambient muons passingthrough the detector. In addition to high kaon fluxes, 2 x 107/machinepulse, features of the experiment that make such sensitivity possible arethe low probability of a negatively charged electron and a muon from a K +

decay, i.e. a good trigger signature, and the ability for good particleidentification at low energies. The apparatus is thus designed aroundgood electron identification employing atmospheric pressure Cerenkovcounters and a lead scintillator shower detector.

In addition to K+ + ir+p+e~, the experimenters will collect several hundredtimes the present data sample for the reaction K+ + n+e+e~. This willenable them to study the Dalitz plot distribution for this decay and lookfor possible e+e' state in the mass range 140 < M g e < 340 MeV.

- 31 -

PROPOSED ADDITIONAL PUHPING

750 !/• DIFFUSION PUMP .

WATCH BAFFLED

pi

00


PQDooopaxncncrMC

Experiment 778 - Study of Nuclear Fragments Produced fromP-Nucleus Coll isions in the Threshold Region 1 < P < 28 GeV/c

Using a Warm Gas Jet Internal Target

xaocoaocoaococoaaooco

Purdue A. Bujak, D.C. Carmony, L.J. Gutay, A.S. Hirsch,University G. Paderewski, N.T. Porile, C. Sangster,

R.P. Scharenberg, B.C. Stringfellow

Spokesman: R.P. Scharenberg

The primary objective of this experiment is to study the production ofheavy nuclear fragments by protons incident on nuclear targets in thethreshold region of 1 < p < 28 GeV/c. The novel features of this experi-ment are:

1. Fragment identification over a wide range of fragment mass andcharge: 4 < Ar < 33, 2 < Z, < 13. On the basis of a recently com-pleted experiment, there is strong experimental evidence that thesefragments are a manifestation of a system undergoing a phasetrans it ion.

2. An acceptance for a wide range of fragment kinetic energies whichpermits: (a) measurement below the peak in the kinetic energy dis-tribution (~ 1 MeV/nucleon), (b) measurement well above the peak,enabling a determination of the kinetic energy slope parameter.

3. A determination of the fragment yields Y(Zc, Ac) as a function ofbeam energy. Since there is a paucity of fragment data in thethreshold region, it is proposed to make a systematic study with asingle apparatus, thereby avoiding normalization problems whichexist in the literature.

4. The use of a 2 ng/cm2 gas jet target located in the main ring beamline.

- 33 -

E7S0

O

1 1 1 1 1

• x

1 I i

I

i

( I I I I I

C-l

2

03

A <»

CQ

tu

vu

5co

0

1

1

i

1

1\

1

1

1

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r-

r-

- 34 -

Status: In Progress

Experiment 780 - A Search for the Flavor Changing Neutral Currents KL

+ V + e and K ° • e+e"

Brookhaven E. Jastrzembski, R.C. Larsen, L.B. Leipuner,

National W.M. MorseLaboratory

Yale R.K. Adair, H. Greenlee, H. Kasha, E. Mannelli,University M. Mannelli, S.F. Schaffner, M.P. Schmidt, C.B. Schwarz

Spokesmen: Scientific - M.P. Schmidt/W.M. Morse

This experiment is to be conducted in the A-3 external proton beam usinga flux of about 10 1 2 protons per pulse at E =30 GeV.

The basic detector will consist of sets of mini-drift chambers placedabout a 72D18 magnet to form a spectrometer, an atmospheric pressurehydrogen Cerenkov Counter, a large lead glass array, and iron/scintil-lator range stack.

The experimenters intend to search for the transitions K^ + ue and K^+ e+e with a sensitivity to branching ratios larger than 10"10. Theseflavor changing neutral currents are highly suppressed in the StandardModel, and the observation of these decays would imply the existence ofnew interactions.

- 35 -

E781

TARGET

SI p|! I I ICP P2nnP3

V Q3(04Ge

D2

The hypernuclear spectrometer at Brookhaven. Quadrupole magnetsQ1-Q6, dipole magnets Dl and D2. Multiwire proportional chambersP1-P6, scinti l lation counters S0-S2, Cerenkov counters CK and CP,scintil lation counter hodoscope H. The target is surrounded by"intrinsic germanium detectors Ge.

- 36 -

Status: Completed in 1984Extended for test

cocooQooaxKaxxxna

Experiment 781 - Spin Dependence of the Lambda Nucleus InteractionDetermined by Observation of Hypernuclear Ganma Rays


MassachusettsInstitute ofTechnology


Carnegie-MellonUniversity

Vassar College

New YorkUniversity

R.E. Chrien, M. May, P. Pile, S. Bart

M. Deutsch

E.V. Kungerford, B. Mayes, L. Pinsky

P. Barnes

R.L. Stearns

B. Budick

Spokesmen: M. Deutsch, M. May

This is a proposal to measure the Y~ray transitions between hypernuclearstates which differ only by the orientation of the lambda spin with re-spect to the angular momentum of the nuclear core. This directly mea-sures the spin dependence of the A nucleus interaction independent of anymodel. We expect these spin dependent splittings to be less than 300keV. Germanium detectors will be used to observe the y rays in coinci-dence with a pure sample cr hypernuclear events in a narrow range ofexcitation energy selected by the hypernuclear spectrometer in LESBI atthe AGS. This proposal continues the research begun in Experiment 760,the first experiment to utilize this (KTT,Y) coincidence technique. Theprobable energy range of the y rays to be observed is inferred from theresults of Experiment 760 and is very much lower than previous theoreti-cal estimates.

- 37 -

.CM

- 38 -

Status: In progress

Experiment 782 - Spin-Spin Effects in Medium and High Pj_ Elasticp-p Scattering

University ofMichigan


University ofMaryland

University ofNotre Dame

Rice University

Texas A&MUniversity

ETH, Zurich

R.J. Bruni, P.R. Cameron, G.R. Court, D.G. Crabb,R. Cummings, I. Gialas, F.Z. Khiari, A.D. Krisch,A.M.T. Lin, R.R. Raylman, R.S. Raymond, T. Roser,K.M. Terwilliger

K.A. Brown, G.T. Danby, Y.Y.. Lee, L.G. Ratner

D.C. Peaslee

J.R. O'Fallon

J.B. Roberts

T.S. Bhatia, G. Glass, L.C. Northcliff

M. Siraonius

Spokesman: A.D. Kriach

This experiment will utilize the new unique AGS polarized proton beamcapability and our polarized proton target to measure spin-spin effectsin proton-proton elastic scattering. We will measure the elastic differ-ential cross sections in pure initial spin states in a completely unex-plored energy and momentum transfer region. The physics motivation isboth the excitement of studying a totally unexplored area, and the fur-ther study of the large and dramatic high-P^ spin-spin effect discoveredat the ZGS. The ratio of the spin parallel to antiparallel p-p elasticcross section reached o + -f:crt+ = k at the maximum ZGS P? of 5.6 (GeV/c)^at 12.75 GeV/c. The ratio will be observed to see if it will continue torise, to plateau, or to drop off as predicted by QCD quark interchangemodels. The unexpected ZGS results suggest that this proposed experimentshould be very exciting.

- 39 -

•BEAM HODOSCOPE

oi

TRIGGER HODOSCOPES

RECOIL PWC'S

o

o < 6 c I < I EXPERIMENTAL LAYOUT


Experiment 785 - Single Spin Asymmetry Measurement in Inclusivep+p Reactions at 24 GeV/c at High Pj_


Universityof Minnesota


D.S. Barton, G. Bunce, A. Carroll, Y. Makdisi

H. Courant, K. Heller, S. Heppelman, M. Marshak,S.Z. Saroff, M. Shupe

J.J. Russell

Spokesmen: Y. Makdisi, H. Shupe

This experiment proposes to utilize the upcoming AGS capability to accel-erate and extract polarized proton beams to measure single spin asym-metries (An) of inclusively produced pions, kaons, protons, antiprotonsand lambda hyperons through the reactions:

p+

K + X

P X

A X

The existing single arm spectrometer of Experiment 755 situated in thezero degree beam line Cl will be used. The above reactions will be stud-ied up to 90° in the center of mass system, thus at high PI and lowFeynman x.

Under constructionStatus: Tests in 1987

To run in 1988

Experiment 787 - A Study of the Decay K + • *+vv

Brookhaven

NationalLaboratory

PrincetonUniversity

TRIUMPF

M.S. At iya , I -H. Chiang, J . S . Frank, J . S . Hagger ty ,M.M. I t o , T .F . Kycia, K.K. L i , L . S . L i t t e n b e r g ,C . I . P e t r i d o u , R.C. Strand, C.L. Woody

W.C. Louis , D. Marlow, P. Meyers, F.C. Shoemaker,A . J . S . Smith

S. Ahmad, G. Azuelos, E. Blackmore, D. Bryman,J . Cresswel l , P . Ki tch ing , J .A . Macdonald, T. Nutnao,J.-M. Pou t i s sou

Spokesnan: T.F. Kycia

This experiment proposes to search for K+ -»• n+x X where X is any neu-t r a l , light and weakly interacting particle with a sensitivity of 2x10" ,three orders of magnitude better than the present limit.

The decay K+ •*• n+vv provides a sensit ive test of the standard model ofweak and electromagnetic interactions, a way of searching for new genera-tions of quarks and leptons and a measure of the mixing angles in thepresent six quark models.

The decay K+ + TT+X°X° is also an excellent place to search for evidence ofthe variety of neutral, light and weakly interacting particles such asaxions, fami Ions, and the supersymmetric photino, goldstino, and scalarhiggs (shiggs) predicted by currant theories.

£788

K

1 1

MWPC

Rangeslabs]

Veto-c

NeutronCounters

K +4A

K"+5Li -+TT+ ;L i

SL1

SL2

Will Measure rp, rn, r t o d

t to ^ 10%,

E(p) Lo ^ 15%.

E(n) to ^10% - 2 0 %

Status: In Progress

Experiment 788 - The Four Feraion Weak Interaction and the Decay

of V e and ^He

OODCDODQDGDGOQD





P. Barnes, G. Diebold, G. Franklin, R. Grace,D. Hertzog, C. Maher, R. McCrody, B. Quinn,J. Seydoux, J. Szyxnanski, X. Yi

R. Chrien, S. Bart, P. Pile, R. Sutter

E.V. Hungerford, T. Kishimoto, L.G. Tang

B. Bassalleck

Vassar College R. Stearns

Spokesmen: P.D. Barnes, G. Franklin

This experiment proposes to study the four fermion weak interactionthrough investigation of the AN •+• NN interaction as manifested in theweak decay of hypernuclei. Using the K~ + A + T~ + A reaction to formyyHe and y He, i t is proposed to determine the life time and the four par-t i a l decay rates that characterize the weak decay. Because the A and thenucleons are all in relative s states one can extract from the decayrates information on the elementary AN •+ NN spin-isospin amplitudes.

The AGS hypernuclear spectrometer at the separated kaon beam, LESBI, willbe used to tag the formation of ^He and ^He. The Carnegie-Mellon rangeand timing spectrometer will be used to measure the time spectrum andenergy distribution of pion and proton decay products from the taggedevents. Coincident neutrons will be detected in a time of flight neutronspectrometer. Previous data of this type is either non-existent or ofvery poor quality. The life time measurement will be based on the coin-cident proton spectrum with a system that has been demonstrated to becapable of a = 100 ps prompt time resolution.

E789 K

TOF COUNTERS

Y PWC RL

VuX

PWC FL

-TARGET

RR PWC

O 6 12 ir.chos

TOF COUNTERS

U PWC FRV

- 46 -


Experiment 789 - Search for 5(2.22) Formationin pp Interactions

New York University J.H. Christenson, E. Hummel, G. Kre i te r ,P. Nemethy, J . S c u l l i , Ming Zuo

Brookhaven National P. YatninLaboratory

Spokesman: J. Sculli

This experiment proposes to measure the cross section for pp + K+K in thereg ion of the £ ( 2 . 2 2 ) . If the peak cross section for o(pp -»• £ •>• K+K~)exceeds one microbarn, i t is expected to observe the s t a t e and measure thewidth.

- 47 -

00

I

6 r

3 AZ Target

10

Vacuum

Lead GlassPolarimeter

Cerenkov

AnalysingMagnets

DriftChambers

ScintillationCounters

I _L5 10 15 20 25 30 35

A plan view of the experimental npparatus. The benm defining

dements are not shown.

40

Status: In progress

Experiment 791 - A Study of Very Rare KL Decays

University ofCalifornia,Los Angeles

Los Alamos NationalLaboratory

University ofPennsylvania

Stanford University

Temple University

College ofWilliam and Marv

R.D. Cousins, J. Konigsberg, P. Melese, P. Rubin,W.E. Slater

J.S. Frank, W.W. Kinnison, D.M. Lee, R.J. McKee,C. Milner, G.H. Sanders, H. Ziock

K. Arisaka, P. Knibbe, W.R. Molzon, J. Urheira,W.D. Wales

S. Axelrod, G.M Irwin, K. Lang, J. Margulies,C.J. Martoff, D. Ouimette, J.L. Ritchie, Q. TrangS.G. Wojcicki

L.B. Auerbach, P. Buchholz, V.L. Highland,W.K. McFarlane, M. Sivertz

M. Chapman, M. Eckhause, J. Ginkel, P. Guss,D. Joyce, J.R. Kane, C. Kenney, W.F. Vulcan,R.E. Welsch, R.J. Whyley, R.G. Winter

CoSpokesmen: R.D. Cousins, W.R. Molzon

This experiment investigates rare IC decays. The first priority is asearch for the decay KL + ve with a branching ratio sensitivity of 10" 1 2 .A positive signal would be the first demonstration of the nonconservationof separate lepton number. 'The experimenters can also collect 103-104

events from the decay 1^ + u+jr. with such a sample the longitudinal po-larizations of the positive muons can be measured with a precision of 10-20%. A nonzero value is indicative of a new CP violating interaction.There is presently no experimental information on the muon polarizationin th is decay. The experiment will search for the decay K->- e"*e~.Since Standard Model predictions lie below the sensitivity of the experi-ment, a positive result would be another indication of new physics. Theexperiment also proposes to search for other rare decays: K + ir°e+e~;

ue; eeuu, etc.

- 49 -

E793

•15 cm

TI5cm

5x1032S itons

Ja.

IiI

0.5 cm Pb 8 sheets 0.06 cm CR-39plastic detector

32S ions

Cross section through target and detector stack. Thicknesses of CR.-39and Pb sheets are 0.06 era and 0.5 era. respectively.

- 50 -

Status: la progress

Experiment 793 - Search for Fractionally Charged Nuclei in15A GeV Sulfur - Oxygen Collisions

University of P.B. Price and M.H. SalamonCalifornia - Berkley

Spokesman: P.B. Price

This experiment proposes to use a stack of CR-39 plastic track detectorsto look for fractionally charged projectile fragments produced in col-lisions of 15A GeV sulfur nuclei with lead targets. The expected chargeresolution is a, = 0.06e for fragments with 19 e/3 < Z < 47e/3. Usingsimilar equipment, an upper limit of ~ 10"^ has been set on the fractionof projectile fragments with fractional charge in 2.1A GeV argon colli-sions with a plastic targec at the LBL Bevalac. Theoretical consider-ations suggest that, if QCD is broken, quarks might become separatedduring a nucleus-nucleus collision and form quark-nucleus complexes ifthe CM energy is high enough. With its order-of-magnitude higher energythan the Bevalat the Brookhaven heavy ion accelerator may permit thisgoal to be achieved.

Additional goals of the experiment are to measure the interaction meanfree paths of projectile fragments, to look for forward-directed frag-ments with higher Z than the projectile, and to measure the dependence ofdetector response on Lorentz factor of the beam.

- 51 -

E794

ECMc

- 52 -

Status: In Progress

Experiment 794 - One-Spin Effects in p+p + p+p at• ,. 2

Universi ty ofMichigan


Universi ty ofMaryland

Universi ty ofNotre Dame

P.R. Cameron, G.R. Court, D.G. Crabb, G. DeMuth,I . Gialas, F.Z. Khiar i , A.D. Krisch, A.M.T. Lin,R.S. Raymond, R.R. Raylraan, T. Roser,K.M. Terwil l iger

K.A. Brown, G.T. Danby, L.G. Ratner

D.C. Peaslee

J.R. O'Fallon

Rice University J .B . Roberts

Texas A&M University T.S. Bhatia, G. Glass, L.C. Northcl i f fe

ETH, Zurich M. Siraonius

Spokesman: A.D. Krisch

This experiment will scatter a high intensity unpolarized proton beamfrom a polarized proton target and measure the left-right asymmetry orAnalyzing Power in proton-proton elast ic scattering. The elastic differ-e n t i a l cross-sections in different in i t ia l spin states in the large-P^region from 6.5 to 8 (GeV/c) will be measured. The phvsics motivationis both the study of the totally unexplored area beyond P^ = 6.5 (GeV/c)and the improvement of the precision at 6.5 (GeV/c) where recent AGSexperiment E748 found a huge and unexpected value of A. The experimentwill observe whether A continues to rise sharply in this previously unex-plored hard-scattering region.

- 53 -

I

PROPOSED SLOW N DETECTOR

[PLAN VIEW]

597cm4G2cm

LESB I I , C8

135cm

COLLIMATOfl S 2

\

?• J EhiiMPWC1

(2X)

lie .

P WC 2,32-(x,y)

OUTER DC

INNER DC

He ; ^ MLct rs_\ /•/

DC

I OUTER DC |

DIMENSIONS

1]OUTER DC:151(h)xlO7(v)x 15(d)cm2]lNNb"R DC:151(h)x 5G(v)x 15(d)cm3] tVl COUNTERS:122(h)x 15(v)x 0.6(d)cm4] NEUTRON CTIIS: 10 O(h) xlO 0(v) x 20(il)cm5]TARGET: SO (I)x40(w)cm (GOO

flNEUTflOWCOUNTER

10 0cm104cm

20 cm


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Experiment 795 - Measurement of the Imaginary Part of the 1=1S-Wave Scattering Length at Threshold

ooqxonxooooooococpoaoocooc



Karlsruhe


Pennsylvania StateUniversity

Rice University

Spokesman:

D.I. Lowenstein

M. Furic, E. Hungerford, T. Kishimoto, B. Mayes,L. Pinsky, L. Tang, Y. Xue

S. Cierjacks, H. Poth

B. Bassalleck

T.A. Armstrong, RiA. Lewis, W. Lochstet, B.Y. Oh,S.M. Playfer, G.A. Smith, J. Whitmore

J. Buchanan, J. Clement, J. Kruk, G. Mutchler,B. Moss, W. von Witsch

G.A. Smith

This experiment proposes to measure Qa. (antineutron velocity*annihila-t ion cross section) for antineutron-protor annihilation at energies ex-tremely close to f?N threshold. This quantity is proportional to theimaginary part of the 1=1 SN 5—wave scattering length. Such a measure-ment may reveal dramatic departures from the classical Bo = constantdependence, which would be suggestive of the existence of bound NKs ta t e s . The energy region in question (T- * 1 MeV) has never been ex-plored, and may be studied with practical upgrades to the existing E767apparatus. The measurement would be complimentary to recently completedE767, which measured antineutron-proton annihilation cross sections athigher energies (5 < T- < 125 MeV). Analysis of data is in progress.

- 55 -

E796

xlN

^ \ \

\ "/\ /

/ \

oo

- 56 -

Status: In progress

Experiment 796 - 11SR Experiments on Hydrides,Fluctuating Magnetic Fields in Solids and Knight Shifts

College ofWilliam and Mary

B. Hitti, J. Kempton, W.J. Kossler, Y. Li,H. Schone


George Mason University W.F. Lankford

University of Warwick


CEN-CNRS Grenoble

University ofUppsala

Technische,Universitat Munchen

Universite de Paris

E. Seymour

A. Goland, K. Lynn, Y.J. Uemura

J.P. Boucher, J. Chappert, D. Fruchart,P. Vulliet, A. Yaouanc

ti

0. Hartmann, E. Karlsson, E. Wackelgaard,R. Wappling

L. Asch, M. Kalvius

J .P . Renard

Spokesman: W.J. Kossler

This experiment uses the D4 stopping rauon beam to carry out six pSRperiments. The experiments are:periments. The experiments are:

ex-

1.2.3.4.5.6.

Muon sites and motion in non-magnetic hydrides.Field fluctuations and magnetic hydrides.A study of the one-dimensional antiferromagnetic (CHj)^ NMnClg.Strain induced muon precession frequency shifts in ferroraagnets.Magnetic fields in heavy fermion superconductors.Giant Knight shifts in vacancies.

- 57 -

E798

30 GeV/c PROTONS

— ^ I m

SEPARATOR'Q3 Q4

MASSSLIT

LES3-1

-rTD::-:4 / 04iGT /si H ::-

KAON SPECTROMETER

MASSSLIT Q5

f D3^ PION SPECTROMETER

- 58 -

Status: To run in 1987

Experiment 798 - Study of Strangeness in Nuclei by Useof the (*+,K+) Reaction

Brookhavan National S. Bart, R.E. Chrien, P.H. Pile, R.J. SutterLaboratory

Carnegie-Mellon P.D. Barnes, G. Diebold, G.B. Franklin, D. Herzog,University J. Seydoux, J. Szymanski

Florida StateUniversity


H. Plendl

E.V. Hungerford, T. Kishiraoto

Los Alamos J.F. Araann, T.S. Bhatia, J.A. McGill, E.C. Milner,

National Laboratory J. C. Peng, R. Silbar, H.A. Thiessen

Rutgers University C. Glashausser

University of Texas M. Barlett, R. Fergsrson, G.W. Hoffman

TRIUMF D. Gill


Spokesmen: J.C. Peng, P.H. Pile

This experiment proposes to extend the (TT+,K+) measurements of E758 bysearching for high-spin hypernuclear scates in 1 60, 2 8Si, and ^Ca and bysearching for dibaryon resonances in deuterium. Targets of i2C and 160will be examined to establish confidence in the calculated quasi-freeproduction. The experimenters intend to measure the ground state excita-tion in Z8Si and possibly 40Ca and to look for highly-excited, deep-lyingstates in 12C.

- 59 -

z

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E801

s

g

o

o00

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00

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C

- 60 -

Status: In progress

Experiment 801 - A Search for Quarks Producedin Heavy Ion Mercury Interactions

San FranciscoState University

Lawrence BerkeleyLaboratory

Fertnilab

University ofCalifornia (Irvine)

R.W. Bland, C.L. Hodges, M. Savage, M. Lindgren,R. Johnson, S. Dickson

H. Mattis, H. Pugh

R. Tokarek

G. Shaw

Spokesman: R.W. Bland

This experiment proposes to search for fractional charges produced inheavy-ion collisions at the BNL heavy-ion accelerator. Mercury will serveboth as a production target and to stop reaction products. It will sub-sequently be distilled, then searched for quarks by a thoroughly provenautomated Millikan technique.

The target will consist of a number of "tuna-can" shaped containers ofmercury, arranged in the form of a long cylinder, with a radius of about0.5 hadronic interaction lengths and with a length of 11 interactionlengths. It is designed to stop most hadronic secondaries produced inthe heavy-ion collisions.

The mercury from the target will be distilled down to a lOO-milligramresidue with fractionally charged particles being retained in the residueby image-charge forces and an applied electric field. An estimated onemilligram of the final residue can be searched for fractional chargesusing the stable-matter quark search apparatus at San Francisco StateUniversity. A sensitivity to one fractional charge per 101*1 heavy-ioncollisions is expected, an improvement of 101* over the current limit, setat an energy eight times lower.

In addition four liquid-nitrogren tanks will be placed in the beam. Frac-tionally charged particles stopping in these tanks will be collected ongold-plated glass fibers biased at ± 5000 V. After the exposure the goldwill be dissolved in small mercury drops, which will be measured in trieSFSU Millikan apparatus.

- 61 -

Henry HigginsDipole Aero C

Target

T7 SE

C Complex

2i

Scale ( meter)

Pi Zero

I

EXPERIMENT # 8 0 2

Status: Under constructionTo run in 1987

Experiment 802 - Studies of Particle Production at Extreme BaryonDensities in Nuclear Collisions at the AGS

3DUXIXXAXXKJOO

Ar gonne Na t i ona1Laboratory


Columbia University

Hiroshima University



University ofTokyo and INS

Waseda University

S. Kaufman, F. Videbaek

A. Alburger, D. Beavis, P.O. Bond, C. Chasman, Y.Y. Chu,J.B. Cumming, R. Debbe, E. Duek, 0. Ransen; P. Haustein,S. Katcoff, M.J. LeVine, Y. Miake, J. Olness, L.P. Remsberg,A. Shor, M. Tanaka, M.J. Tannenbaum, M. Torikoshi,J.H. van Dijk, P. Vincent, H. Wegner

S. Nagamiya, W. Zajc

T. Sugitate

H. Crawford, D. Greiner, P. Lindstrotn

H.A. Enge, L. Grodzins, R.J. Ledoux, S.G. Steadman,G. Stephans, E. Vulgaris, D. Woodruff

Y. Akiba, H. Hamagaki, S. Hayashi, S. Homma, Y. Ikeda

T. Doke, J. Kikuchi

Spokesmen: 0 . Hansen, S. Nagamiya

An experiment using 32S and 160 beams from the Tandera-AGS accelerator at T/A=14.6GeV/a.m.u. is proposed. Semi-inclusive spectra of p~, T~, K~, d, a, and $ will bemeasured with a 25 msr single arm magnetic spectrometer. The primary physics goalis to establish effective temperatures in the hard nucleus-nucleus collisions andto measure particle production cross sections. These quantities may indicate ifphase transition to a quark-gluon plasma has taken place. Particle identificationfor p, IT, and K will be provided up to 5 GeV/c. Neutral transverse energy-flowwill be recorded using a segmented Pb-glass wall. The trigger arrangements, inaddition to the Pb-glass, encompass a 5000 pad proportional tube arrangement formultiplicity, a 0° thin scintillator to veto events with high Z forward going pro-ject i le fragments, and a beam calorimeter. A 1 msr solid angle complex of threegas Cerenkov counters with TOF and tracking will be used in conjunction with thespectrometer to measure and identify 5 to 20 GeV/c secondaries. The experimentfeatures an active target.

- 63 -

E804

50

40 -

£30-302LU3

1 ' ' • 1 '

. . I . . i1

1

I;1 11

2Q _

10 -

9 10 II 12 13 14 15 .16 17 18 19NORMALIZED CHARGE

Charge distribution of projectile fragments measured with 1.7 cm of theirpoints of interaction. 75 primary Ar nuclei were included for

calibration.

- 64 -

Status: In progress

Experiment 804 - A Search for Fractional Charge with Heavy Ion Beamsat the Brookhaven AGS

cococoooGoaxxxxx ooooooooooooa cococommaxixrwoo

Indiana University S.P. Ahlen

University of G. TarleMichigan

Spokesmen: S.P. Ahlen, G. Tarle

This experiment proposes to extend studies initiated at the Bevalac tosearch for fractional charge production in high energy nucleus-nucleuscollisions with high precision track etch detectors. Although no candi-dates were observed in tiie Bevalac experiments, it is possible that thedramatic increase in energy available at the AGS would be sufficient toallow quark deconfineraent for the first time.

- 65 -

B,

y

E8O5

TUNING ROD

SUPPCRTTUBE

COPPERrCAVITY [

Z7.7 5"

- 66 -

Status: In progress

Experiment 805 - A Search for Galactic Axions

University of S. DePanfilis, A.C. Melissinos, B. Moskowitz,Rochester J. Rogers, Y. Semertzidis, W. Wuensch

Fertiilab W.B. Fowler, F. Nezrick

Brookhaven National H. Halana, A. ProdellLaboratory

Spokesman: A.C. Melissinos and H. Halama

Evidence indicates that the axion must have a light mass (ma - 10 5eV),

and it has been suggested that axions may form the dark matter in thegalaxies. In spite of their weak coupling, axions can be detected throughtheir electromagnetic conversion to a photon in the presence of a strongstatic field.

The detector consists of a copper microwave cavity located in a 6.6Tsuperconducting solenoid with a 20 cm bore and 50 cm in length. The sig-nal from a field probe in the cavity is amplified by a GaAs FET followedby two stages of mixing and detected by an FFT. The cavity is tuned by amovable sapphire rod which is inserted into the cavity under computercontrol.

Data taking began in August 1986 at a frequency of v = 1.090 GHz and it isplanned to search the region up to v = 6 GHz. A set of six cavities willbe used over this range. The detector sensitivity corresponds to an ef-fective noise temperature T N = 0.1'K. A search for continuum radiationthat couples to the electromagnetic field in the same way as the axion isalso being carried out.

There are future plans for the construction of a 17T coil and for extend-ing the search to the range 6 < v < 20 GHz.

- 67 -

manualcontrolboard

picture,analysis;omputer

PACg

PAC 1

PAC2

PAC 3

stage

movementand

c o n t r o l

video

adaptor

video signal

pixel addrestes

cameracontrol

video-camera

microscofocus

z-steppingmotor andencoder x-

steppingmotors andencoders

Automatic Track Measuring System

- 68 -

Status: In progress

Experiment 806 - Nuclear Fragmentation in Heavy Ion Collisionsat 15 GeV/amu

University C. Brechtmann, H. Drechsel, J. Dreute

of Siegen W. Heinrich

Spokesman: W. Heinrich

This experiment proposes to expose stacks of plastic nuclear track detec-tors at the Tandem-AGS Accelerator Complex to 15 GeV/amu 32S beam. Nu-clear fragmentation cross sections of beam nuclei and fragments withcharges Z > 6 will be measured for collisions with different targets. Theenergy independence of the cross sections and the validity of the factor-ization of these cross sections into a target and a projectile-related-part at high energies will be tested. The experiment is designed to de-tect unexpected large emission angles of the fragments. The anomalousinteraction mean free path effect will also be investigated. A new tech-nique of automatic readout for the plastic detectors will be used whichwill allow the measurement of large quantities of tracks in these passivedetectors.

- 69 -

E808

Fij. L. Sche.T3.tic diagram of emulsion stack: exposures.

DIRECTION

1 - !V t - w

w. II

I

Fig. 2. Schematic diagram of *he emulsion chamber exposures

- 70 -

Status: In progress

Experiment 808 - Interactions of 14.1 GeV/amu Nuclei from 160to 197Au in Light and Heavy Targets

OCDCPOQCOOOaXTMOfflro

Institute ofNuclear PhysicsKrakow, Poland

Louisiana StateUniversity

University ofMinnesota

A. Jurak, R. Holynski, A. Olszewski, B. Wilczynski,H. Wilczynski, W. Wolter

L. Barbier, W.V. Jones, E. Pruet, J.P. Wefel,B. Wosiek

P.S. Freier, C.J. Waddington

Spokesman: C.J. Waddington

This experiment proposes to use nuclear track emulsions for investigatinginteractions of 1 6 0 , 32S and, when available, 108Ag and 197Au nuclei inlight (plastic) and heavy (emulsion and lead) targets. Emphasis will beplaced on the analysis of central collisions by selecting events exceedinga given threshold of target excitation, as defined by the number of lowenergy fragments emitted from the target nucleus.

Measurements in the emulsions will include (1) the charges and emissionangles of the projectile fragments, (2) the number and emission angles ofthe produced charged particles, (3) the number and angular distributionsof heavily ionizing particles emitted from the emulsion target nuclei,and, for a subset of the events (4), the number and energy of electronpairs in restricted angular regions. The data will permit studies of (1)projectile fragmentation modes, including transverse momentum distribu-tions and possible dependences on th<e topology of the interactions, (2)the pseudo-rapidity distributions (including structure, correlations, etc)of charged particles and the dependence of the multiplicy on the number ofinteracting nucleons, and (3) the possibility of enhanced production ofdirect photons/electrons in high density matter.

- 71 -

ER10

O

- 72 -

Status: Tests in 1987

CDCDGD2XOGOOOCC

Experiment 810 - A Search for Quark Matter (QGP)and other New Phenomena Utilizing Heavy Ion Collisions

at the AGS

PODOxoaaaxocoonnryinrixixnaxpaaooooq

Brookhaven

NationalLaboratory

City College ofNew York and BNL

City College ofNew York

Johns HopkinsUniversity


A. Etkin, K.J. Foley, R.W. Hackenburg,R.S. Longacre, W.A. Love, T.W. Morris, E.D. Platner,A.C. Saulys

S.J. Lindenbaum

C. Chan, M.A. Kramer

P. Halraan, L. Madansky

W. Geist, C. Gruhn, M. Heiden

Spokesmen: S.J. Lindenbaum and E.D. Platner

This experiment proposes to study heavy ion collisions at the AGS by mea-suring the angles and momenta of virtually all charged particles emitted ineach event. Particle identification will be determined where possible.

The experimenters will look for anomalous behavior in rapidities (or pseudo-rapidities), multiplicity, strangeness enhancements, P,(E^), energy flow;possibly observe Hanbury-Brown and Twiss effects, deflagration (detona-tions), and other new phenomena. These observations will be on an event-by-event basis so that particularly interesting classes of events can beselected and added together to search for new effects implying a QGP orother new states of matter, in a manner which tends to maximize signal-to-background ratios.

- 73 -

IIlAgUPf

BEAM LEFT TO RIGHT i

E311Fitch Cnunler

Nnl Shielding

K" stop counters X Range Telescope

Pb Collimator8" aperture

Target mount

-i dewar

c r y s t a i(inside shielding)

/ ; V.-- -x-.s-.-sv' :•• - •,-:

LHj dewar

BEAM OUT OF PACE

V-1 C

Range Scimillators

' / / /

- 74 -

Status: la progress

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Experiment 811 - Radiative Kaon Captureand Hyperon Weak Radiative Decay

Boston University

University of Birmingham

University ofBritish Columbia

Kozponti FizikaiKutato' Intezente

TRIUMF


Case WesternReserve University

Spokesman:

E.C. Booth, C. Heisay; K.P. Gall, E.K. Mclntyre,J.P. Miller, B.L. Roberts, W. VanRiper, D. Whitehouse

J. Lowe, N. Hessy

M.D. Hasinoff, D.F. Measday, A. Noble

D. Horvath

M. Salomon

M. Sakitt, J. Skelly

W. Fickinger, D.K. Robinson

B.L. Roberts

This experiment proposes to measure the branching ratios for p(K~,Y)Aand p(K~,Y)£°as well as the weak radiative decay I+ + p + Y using stopped kaons from LESB II.These will be measured simultaneously using a large, high resolution Nal totalabsorption scintillation counter (TASC) to detect the photons. The weak radiativedecay A + n + Y will be measured in the second half of the experiment. K~ will bestopped in LH2- The photon spectrum in coincidence with a K~ stop will contain theradiative capture photons. The radiative capture branching ratio for Kp + AY isexpected to be measured to a few percent. The observation of the I°Y final stateis less certain as the branching ratio is completely unknown, We will have a sensi-tivity down to 7 x 10~5. These two ratios will provide detailed information on thequark wavefunct ions inside the A, Z°, and the A(1405). The weak radiative decayphotons will appear in two tagged spectra. A(E+) production will be tagged bydetecting the tnonoenerget ic Tr°(ir~) associated with their production. The branchingratio for weak radiative decay (WRD) of the E + will check several controversialexperiments. The branching ratio measurement for the WRD of the A will be thefirst measurement. We will also measure the branching ratio for K~d * nAY as wellas to study the backgrounds present. This will be the first measurement of radi-ative capture in deuterium and will determine the feasibility of other experimentsin deuterium. If the TASC has sufficiently good resolution, the spectrum in theendpoint region will provide information on the An scattering length.

- 75 -

E813

-> (E~d) atom

H - n - E

detector

Aerogel

Cherenkov

Large Angle5% ResolutionSpectrometer

Schematic of Apparatus

- 76 -


Yvvv*p*rvvirfii m rtm-rv-ru-nrrwiifrvrtdtvfu wxriserirrifTirwinvivrirrti'ni'rit'ndViriiriirn

Experiment 813 - Search for a Strangeness -2 Dibaryon

COOOCOCOCOOOCHX


P.D. Barnes, G. Diebold, G. Franklin, R. Grace,D. Hertzog, C. Maher, R. Rieder, J. Seydoux,J. Szymanski, B. Quinn

Brookhaven National S. Bart, R. Chrien, P. Pile, R. SutterLaboratory

Erlangen-Nurnberg W. Eyrich, A. Hofman

University

ii

Freiburg University J. Franz, N. Hamann, E. Rossle, H. Schmitt

University of Houston E. V. Hungerford


University ofPittsburgh

CEN, Saclay

Vassar College

B. Bassalleck

S. Dyttnan

P. Birien

R.L. Stearns

Spokesman: G. Franklin, P.D. Barnes

This experiment proposes to study the strangeness -2 two baryon massspectrum from 100 MeV below the mass of the lightest known two baryonstrangeness -2 system, AA, to 20 MeV above the AA mass. The experimentis motivated by Jaffe's 1977 prediction of a six quark object withstrangeness -2 and J1t=0+ at a mass of 2150. This particle, called the"H", has been predicted by later bag models as well. Although th<» masscalculation is somewhat model dependent, the predictions are consideredwithin the expected range of sensitivity. The possibility of resonancesnear rns AA mass due to conventional meson exchange forces can also beexploded since the experiment covers the region both above and below theAA mass.

- 77 -

C-cal

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Active target 1 DC 2Magnet scinl rf

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Spectro. .eter magnet

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120 130

Status: Under -:iat ructionTest run in 1987

Experiment 814 - Study of Extreme Peripheral Collisionsand of the Transition from Peripheral to Central Collisions

in Reactions Induced by Relativistic-Heavy Ions


CEBAF

CERN

Los AlamosNational Laboratory

Michigan StateUniversity



State University ofNew York, Stony Srook

University of Tel Aviv

Yale University

M. Fatyga, R. Hogue, D. Lissauer, T. Ludlam,L. Olsen, V. Polychronakos, I. Stumer

V. Burkert

W.J. Willis

J. Boissevain, N.J. DiGiacomo, A. Gavron,B.V. Jacak, P.L. McGaughey, W.E. Sondheim,J.W. Sunier, H. V*;n Hecke

M. Maier

B. Bassalleck, J. Hall, N. Korainos, D. Wolfe

W. Cleland, J. Saladin, J. Thompson

P. Braun-Munzinger, P. Paul, J. Stachel, L. Waters,

T. Throwe

0. Senary, S. Dagan, Y. Oren

B. Shivakumar

Spokesaan: P. Braun-Munzinger

This experiment proposes to study extreme peripheral collisions as wellac more central collisions by combining 4TT calorimeter coverage with ahigh resolution forward spectrometer. This will allow a completely ex-clusive study of the projectile fragmentation region and permit examina-tion in detail of characteristics of more central collision rvents suchas distributions of energy flow in conjunction with high resolution in-formation on the leading bar--'ons.

- 79 -

E815

SCINT LIGHT PIPE TUBE BASE

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4' SCINT

6 '

.IGHT PIPE TUBE

-- 6'

BASE

2'

- 80 -

Status: In progress

Experiment 815 - Study of Particle Production and Nuclear Fragmentationin Collisions of Heavy Ion Beans with Emulsion Nuclei

University of Jaipur K.B. Bhalla, V. Kumar, S. Lokanathan

University of T.H. Burnett, J.J. Lord, R.J. Wilk.esWashington

Lawrence Berkeley E. Friedlander, H.H. Heckman, Y. KarantLaboratorv

University ofMarburg

E. Ganssauge

University of Lund S. Garpman, N.-Y. Herrstrom, B. Jakobsson, I. Lund,B. Np,ren, I. Otterlund, S. Persson, E. Stenlund,K. Soderstrom

University of Ottawa C.J.D. Hebert, J. Hebert

National Research B. JudekCouncil, Canada

University of Jamrau N.K. Rao

Spokesmen: I. Otterlund

This experiment proposes to measure, on an event-by-event basis, pseudo-rapidity density distributions, density fluctuations, multiplicity andangular distributions of nuclear fragments and recoiling protons (30-400MeV) cross sections for production and interaction of light and medium (Z= 2-8) projectile fragments and the partial inelasticity for productionof photons. The studies are performed in the energy range 13-200 A GeV.The detectors are emulsion chambers, as well as conventional emulsionstacks.

- 81 -

I

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muon idenhfication

Sci = Trigger hodoscopes

Xi = Flash tube • iron planes

XY = Flash tube planes


Experiment 816 - Search for Neutrino Oscillations

Boston University


CERN

LPNHE Paris

G. Bernardi, J. Stone

M.J. Murtagh, D.H. White

C. Detraz, J.M. Perreau, M. Ferro-Luzzi

P. Asrier, J. Chauveau, A. Diaczek, J. Dumarchez,F. Kovacs, A. Letessier, J.M. Levy, Y. Pons,A.M. Touchard, F. Vannucci

Spokesman: ?. Vannucc i

This experiment proposes to repeat, with 20 times more statistics, an ex-periment done at CERN in the low energy PS neutrino beam. A possible ex-cess of exclusive events with electrons gives a tantalizing indication ofoscillations. The effect is based on about 20 events. Experiment 816should have an jider of magnitude more events.

- 83 -

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EXPERIMENTAL LAYOUT for E-817


Experiment 817 - Polarization Transfer in Hyperon Production

Rice University


Johns Hopkins

University



B.E. Bonner, J.A. Buchanan, J.M. Clement,M.D. Corcoran, N. Krishna, J.W. Kruk, H.E. Miettinen,G.S. Mutchler, F. Nessi, M. Nessi, G.C. Phillips,J.B. Roberts, P.M. Stevenson, S.R. Tonse

A. Birman, S.U. Chung, R.C. Fernow, H. Kirk,S. Protopopescu

T. Hallman, L. Madatisky

B.W. Mayes, L. Pinsky

Z. Bar-Yam, J. Dowd, W. Kern, E. King

Spokesmen: B.E. Bonner and J.B. Roberts

Since the discovery that inclusively produced hyperons are polarized, theunderlying cause of the effect has remained a mystery. No perturbativeQCD predictions are possible for the kinematic range covered by experi-ment, but simple parton-based theories that explain the effect in termsof breaking of strings or Thomas precession of strongly acceleratedquarks have had a remarkable degree of success in explaining the effect.This experiment aims to measure the hyperon polarization when produced bya polarized proton beam. The question being addressed is how much thehyperon polarization is influenced by that of the proton. The experimenthas been performed for the case of lambdas produced by polarized protonsat 13 and 18 GeV/c. In rough agreement with the model, the lambda polar-ization is independent of that of the proton (D™ «• 0) and the left-rightasymmetry for lambda production is also near zero. We are eager to mea-sure the case of I" where the predicted effects are large ( D ^ ~ 2/3, A ~.2). This will provide a definitive test of these simple models as wellas further information on the mysterious case of the inclusive hyperonpolarization.

- 85 -

E818

- 86 -


PCExperiment 818 - Search for a J - Exotic Hybrid Meson


A. Biraan, S.U. Chung, R.C. Fernow, H. Kirk,S.D. Protopopescu

Indiana University R. Crittenden, A. Dzierba, T. Marshall, D. Zieminska


N. Bar-Yam, J. Dowd, W. Kern, E. King

Rice University B.E. Bonner, J.B. Roberts, G.C. Phillips

Spokesman: S.U. Chung

The aim of this experiment is to look for a JPC-exotic meson which cannotcouple to a quarkonium. Such a state is expected as a hybrid meson com-posed of a qq in color octet and a valence gluon. In particular, a hy-brid meson with JPC = 1~ and I = 1 is supposed to decay into the channelsD(1285)n and B(1235)n.

- 87 -

0000

COUNTERTELESCDPE SCINTILLATDR

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CDUNTING ROOM

SCALER

CWc

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IDELAYI IDELAYI IDELAYI


Experiment 819 - Electromagnetic Dissociation of 5%I0, 89Y, and 197Auby 15 GeV/Nucleon l60 and 32S

Iowa State J.C. Hill, M.E. Nieland, J.A. Winger, F.K. WohnUniversity

Spokesman: J. C. Hill

This experiment will extend measurements of electromagnetic dissociation(ED) in target fragmentation carried out on 59Co, 89Y, and 197Au targetsat the Bevalac and AGS. The experimenters now propose to bombard Co, Y,and Au targets with beams of 15 GeV/nucleon ^0 and 32S using the AGSheavy ion accelerator. For each target type three foils of successivelygreater thickness (ex. 50, 100, and 250 mg/cm2 Au) will be irradiatedsimultaneously in order to correct for the contributions of secondaryreactions which are significant for one-neutron out processes. The beamwill be monitored using appropriate wire and ion chambers.

- 89 -

E820

m 013-15

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03 Q4 SLITt 03

SPECTROMETER

f«? hod^4'--Pt

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Hypernuclear Spectrometer, 3He target and Range Hodoscope

- 90 -


Experiment 820 - Search for S = -1 Dibaryon Resonance (D )in the Mass Region (2050-2130) MeVUsi c the Reaction 3He(K~,ir+)n D g

BrandeisUniversity

L. Bensinger, L. Kirsch, H. Piekarz

Brookhaven National S. Bart, R. E. Chrien, P. H. Pile, R. J. Sutter

Laboratory

Indiana University T. Ward


Osaka University


M. Deutsch

T. Fukuda, T. Shibata

E. V. Hungerford, T. Kishimoto, B. Mayes, L. Pinsky

University of Texas M. Barlett, G. W. Hoffman

Vassar College R. L. Stearns

Spokesman: H. Piekarz

The He(K~,Ti+)n Dg reaction will be studied using the Hypernuclar Spec-trometer in the LESB I beam line. As the Dg resonance is expected to bein p-state, the "n Ds" missing mass spectra will be measured at scatter-ing angle e

KlT = 21°, where previously D state has been observed.

- 91 -

\ \ \ \ \ \ \ \ \ ' . \

V

Status: Stage I approval(Funding pending)

Experiment 821 - A New Precision Measurement of the muon g-2 Valueat the Level of 0.35 PPM

Boston University


City College of New York

Columbia University

Cornell University

University of Heidelberg

Los Alamos National Laboratory

University of Michigan

University of Mississippi

Sheffield University

University of Tokyo

National Laboratory forHigh Energy Physic's (KEK)

Riken

Yale University

Spokesman:

E. Hazen, C. Heisey, B. Kerosky, F. Krienen, D. Magaud,E.K. Mclntyre, D. Magaud, J.P.Miller, B.L. Roberts,D. Stassinopoulos, L.R. Sulak, W. Worstell

H.N. Brown, E.D. Courant, G.T. Danby, C.R. Gardner,J.W. Jackson, M. May, A. Prodell, R. Shutt,P.A. Thompson

J.A. Johnson, M.S. Lubell

A.M. Sachs

T. Kinoshita

G. zu Putlitz

W.P. Lysenko

A. Rich

J.T. Reidy

F. Combley

K. Nagaraine, K. Nishiyama

K. Endo, S. Kurokawa

K. Ishida

S.K. Dhawan, A.A. Disco, F.J.M. Farley, V.W. Hughes,Y. Kuang, H. Venkataramania

V.W. Hughes

The measurement of the anomalous magnetic moment or g-2 value ">f the muon to a preci-sion of 0.35 ppm which would represent an improvement by a factor of 20 over thefamed CERN muon storage ring experiment, has been proposed. The general method willbe the same as that of the latest CERN experiment, but with greatly improved statis-tics due to the high proton beam intensity of the AGS. Major improvements in themagnetic field uniformity and monitoring in the storage ring as well as improveddecay electron detectors and data acquisition electronics will reduce the systematicerrors. The primary aim of the AGS experiment is to measure the electroweak radiativecorrection to mtioa g-2 and thereby test the renormalizability of the standard theory.However, it will go beyond that goal and produce information on physics above 1 TeV byextending the search tor lepton substructure and testing speculative new theories, suchas supersymmetry.

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ES25

ooo

10'

10

.6' 10 100

PROJECTILE ENERGY (CeV)

1000

Longitudinal velocity of representative Au target f™Pjentsas a function of the kinetic energy of the *H, " C , ^Ne,projectiles.

d =0,10, or 20cm

Experimental setup for unusual projectile fragment study.


Experiment 825 - Radiochemical Studied of UitrarelativisticNuclear Collisions

Oregon StateUniversity

U. Loveland, C. Casey, T.T. Sugihara

Lawrence Berkeley G.T. Seaborg, E.M. FriedlanderLaboratory

Brookhaven National n.E. Haustein, J.B. Cumraings, S. Katcoff, Y.Y. Chu

Laboratory

Phillpps Universitat R. Brandt, G. Dersch, G. Haase, P. Vater, R. Weiner

University of Oslo E. Hagebo, P. Hoff

Purdue University N.T. Porile, M. Bronikowski, Y.H. Chung

Studsvik Science K. Aleklett, L. SihverResearch Lab.

Spokesman: W. Loveland

This experiment proposes to extend previous studies of target fragmenta-tion (measurements of which found unusual behavior of projectile fragmentsformed in the interactions of 1.8 A GeV ^Ar with Cu), to ultrarelativis-tic nucleus-nucleus collisions by measuring the target fragment yields andrecoil properties for the interaction of 15 A GeV * 60 and/or 32S with Cu,Ag, La and Au. It will specifically ascertain whether the hypotheses oflimiting fragmentation and factorization will continue to characterizetarget fragmentation as they have for nucleus-nucleus collisions inducedby <2 A GeV projectiles.

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E825

-50cm

Ion beams f|

beam monitoring

scintillation

counter

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Experiment 826 - Exclusive Experiment of High Energy Nuclear ReactionsInduced by 32S Ions with 15 GeV/N at BNL AGS

Saga University H. Itoh

Tohoku University

Nagoya University

T. Hayasino, Y. Yamato, M. Chida

K. Nakazawa

Osaka University

Sagami Instituteof Technology

Gifu University

Utsunomiya University

Kanagawa University

R. Ihara, T. Nakai

H. Sugimoto, K. Taira

S. Tasaka

Y. Sato

N. Tateyatna

Spokesman: R. Itoh

This experiment proposes to study the nuclear interactions induced by Sions with 15 A GeV accelerated at the AGS in order to reveal the newphenomena of nuclear matter (quark gluon plasma, hydrodynaraical motion ofmulti-nucleon system, etc.) by exclusive analysis of high enrgy nuclearcollisions.

- 97 -

E823

do-dTn sr MeV J

16* + 0 — P • X

\ - 720 MGV

cos6D= 0.93-0.97

50

0 100 200(MGV)

300

Calculated cross sections for the reaction n+ + 16O -v p + X. Shaded peakcorresponds to the formation of the ri-mesic nucleus 1=°0. Solid curve

represents the background events due to the (n+,Tip) process.

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Status: Completed in 1987

Experiment 828 - Search for THKesic Nuclei with the (**,p) Reactionat 0.85 GeV/c

Los Alamos NationalLaboratory

B.J. Dropesky, R.J. Estep, G.C. Giesler,L.C. Liu

College of William and Mary M. Finn, H. Funsten, C.F. Perdrisat


S. Bart, R.E. Chrien, P.H. Pile,R.J. Sutter, T.E. Ward

George Mason University B.J. Lieb

Rutgers University R.D. Ransome

University of Houston T. Kishimoto



Spokesmen: L.C. Liu, H.O. Funsten, R.E. Chrien

This experiment proposes to verify a recent theoretical prediction of thepossible existence of strongly bound systems of the n-meson and nuclei:the n-mesic nuclei. This prediction is based on two facts: (1) recentanalysis of threshold ir~p + im production indicates that the n-nucleoninteraction is attractive at low energies; and (2) because of quantummechanical effects, a nucleus with sufficient size can cause this attrac-tion to develop strongly bound states that cannot exist between an etameson and a free nucleon.

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£829

3 IIHe

He

PPn

PPn

A

n

n

An

n

A

B

3HeP

Pn

A

nn

C

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Experiment 829 - Search for an S * -1 Three-Body Bound System


E.V. Hungerford, T. Kishimoto, B. Mayes, L. Pinsky

BrandeisUniversity

H. Piekarz


S. Bart, R.E. Chrien, P.H. Pile, R.J. Sutter,T.E. Ward


M. Deutsch

Osaka University T. Fukuda, T. Shibata

Universityof Texas

M. Barlett, G.W. Hoffman


Spokesman: T. Kishimoto

This experiment proposes to search for ppA and nnA bound systems by usingthe (K~,TT~) reaction on a He target. Experimentation has confirmedthere is no bound state in the S = -1 two-body system. The lighteststrange bound system experimentally known is j He which has very smallbinding energy. Preliminary considerations predict a slightly unboundppA or nnA system; this cannot be taken as conclusive because of thelarge uncertainties of the three-body force. Experimental confirmationis desirable.

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E831

- -50cm

Ion beams

Magnet

\ /

-50cm

beam monitoring

scintillation

counter

7Emulsion

Spectrometer

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Experiment 831 - Search for the Hypernuclear ProjectileFragments in the Relativistic Heavy-Ion Collision

Using an Emulsion Chamber

University ofTokyo, INS

C. Nagoshi, K. Omata

Kobe Universitv H. Fukshitna, H. Fukushima, T. Hara, M. Miyagaki,K. Taruraa, C. Yokovama

Brookhaven D. BeavisNational Laboratory

Spokesman: Y. Shida

This experiment proposes to search for hypernuclear projectile fragmentsin the collision induced by 6 A*GeV/c and 14 A*GeV heavy ions. The pro-duction cross section of the hypernuclear fragment will provide informa-tion on the possibility of a secondary hyperbeam. If the ratio of thehyperfragraents to normal ones (= R) is large, the lives and other prop-erties of the hypernuclei can be studied. R is expected to increase morethan an order of magnitude at 6 A*GeV/c due to increased hyperon produc-tion, and because of better kinematical matching in the formation prob-ability of hyperfragments. In addition, secondary hyperon productionprocesses such as the K, reaction should contribute to the production ofthe hypernuclear fragments. The beam energy will be varied to see if theyield saturates at higher incident energy.

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SCALE

2 METERS

C2

o

I

NUCLEAR TARGETS

PWCS SPECTPOMETERMAGNET A

H 3 , H4

VETOCOUNTERS

DWC 2

SIDE PWCS DWC I

Plan view of the Exp. 755 apparatus as modified for this proposal. Nuclear targets I w e been substi-tuted for the liquid hydrogen target and the atmospheric Cerenkov counter C3 has been tided. In actualrunning the spectrometer and side PWC's will probably be interchanged about the beam ait's.

Status: In progress

Experiment 834 - Study of Hadronic Hard Scattering Wave FunctionsUsing Elastic Scattering Inside Nuclei


D.S. Barton, G.M. Bunce, A.S. Carroll, S. Gushue,Y.I. Makdisi

University ofMinnesota

H. Courant, K.J. Heller, S. Heppeltnann, M.L. Markshak,E.A. Peterson, K. Ruddick, M.A. Shupe


J.J. Russell

Spokesmen: A.S. Carroll, S. Heppelmann

This experiment proposes to study short distance wave functions of had-rons for the case of large pt exclusive scattering to determine whetherthe basis for many large pt perturbative calculations using QuantumChromodyanmics (QCD) is correct. These calculations assume that at themoment of interaction (and for some time before and after) the hadronsconsist only of valence quarks which occupy a very small region in space.During this time, the interaction of such hadrons are anomalously small.

Using the apparatus of Exps. 755, 785 and 790, elastic scattering of 9GeV/c pions from protons inside nuclei will be measured. By observingthe dependence or ""'ie A of the nucleus, conclusions will be made whetherthe interaction o£ the incomiag and outgoing hadrons is anomalously smallor nearly the same as low pt processes. In the former case the crosssection will be proportional to Z and in the latter, it will grow veryslowly with A. Such a small hadronic cross section would be a strikingeffect independent of the precise mechanism.

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E835

30 GtV/c Proton*

Q l Separator

KoonProduction LLoo- i-Target

Target

D3

CountersTransmission

Target

lOcm

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Status: Test in 1987To run in 1987

jxocoooaxnaxiAjoaxocococixiauxocoooooaxgaaooaxa

Experiment 835 - Kaon-Nucleus Total Cross Section Measurementsand Partial Deconfinement in Nuclei

Tel AvivUniversity

J. Alster, D. Ashery, J. Lichtenstadt, M.A. Moinester,I. Navon, E. Piasetzky, A. Rahav, I. Yavin

Brookhaven S. Bart, R.E. Chrien, M. May, P.H. Tile, R.J. Sutter

National Laboratory

Spokesmen: E. Piasetzky and R.E. Chriec

The classical view of nuclear physics is that nucleons in nuclei have thesame properties as free nucleons. This approach has had substantialsuccess; however, recent data, as well as some problems in low energynuclear physics have led to a suggestion that the size of the nucleonincreases inside the nucleus, as a consequence of a change in quark-deconfineraent scale. It is important to test the hypothesis in a dif-ferent momentum regime and with a different probe. A measurement of theratio of K+-nucleus to K+-deuteron total cross section is proposed. Thisratio is predicted to be sensitive to the proposed change in the radiusof the nucleon in the nucleus.

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Hodo

Ma TargetPlus cryogenics TOP VIEW

o00

Fig. 3. Experimental apparatus for -*He target I I particle search

SIDE VIEW

Hodo

Ho Target

plus cryogenics

I—Om 1m 2m 3m

Beam

5m

or

7m

Status: DesignTo run in 1990

Experiment 836 - Search for a Strangeness - 2 DibaryonUsing a % e Target

Brookhaven National S. Bart, R. Chrien, P. Pile, R. Sutter

Laboratory


Erlangen-NurnbergUniversity

P.D. Barnes, G. Diebold, G. Franklin, R. McCrady,J. Seydoux, J. Szymanski, B. Quinn, X. Yi

W. Eyrich, A. Hofman

Freiburg University J. Franz, N. Haraann, E. Rossle, H. Schaitt

Kyoto SangyoUniversity



CEN, Saclay

Vassar College

F. Takeutchi

B. Basslleck

S. Dytman

P. Birien

R.L. Stearns

Spokesman: G. 8. Franklin, P.D. Barnes

This experiment proposes to replace the two component target, used in the( = ~ , d ) a t o m H search of Exp. 813, with a single ^ e target used in the

reaction K~ + 3He + K+ + H + n. With the ^ e target, greater sensitivityto a more tightly bound H is achieved. The He target is to be con-sidered a logical addition to the two component target measureraent toextend the region of sensitivity to greater values of binding energy.

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E83t>

*-SIOE PWCS

Plan view of the detector: BH and HI-H4 arescintillation-coumer hodoscopes; PWC and DWC refer toproportional and drift wire chambers; and Cl and C2 arethreshold gas Cherenkov counters for pions and kaons,respectively. The spectrometer magnet bent positive parti-cles down and defined a narrow range of production angles

( 0 gabout 22° in the laboratory. ( / I 8 . I 4 0 ^ (,

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XDaoaxxHooo

Experiment 838 - 90* Exclusives at 6 GeV

Brookhaven D.S. Barton, G. Bunce, A.S. Carroll, Y.I. MakdisiNational Laboratory

University of H. Courant, K.J. Heller, S. Heppelmann, M.L. Marshak,Minnesota M.A. Shupe

Southeastern J.J. RussellMassachusettsUniversity

Spokesmen: G. Bunce, J.J. Russell

This experiment proposes to measure or set more stringent limits on the13 exclusive reactions at 90° CM which were studied at 10 GeV, takingadvantage of the higher cross sections at 6 GeV. A factor of 3 smallermomentum bite than was used at 10 GeV will be used, improving the missingmass resolution.

- Ill - jit-

P u b l i c a t i o n s o f A G S E x p e r i m e n t s 1 9 8 2 - 1 9 8 7

This is a new feature of the AGS Experiments book where the listings willcover experiments appearing in the previous 3-year sequence; on-going experimentstor those which have yet to take data) have the notation "running". Only refereedjournal reports are listed here or, when only conference reports ha./e been found,one conference report is listed. This was prepared using the SLAC database SPIRES.Authors were not always consulted this time, although we expect to hear from themin the future. It is easy to miss publications in such a wide search, and we apol-ogize for any left out or misidentified. Please let us know about these as well askeeping us posted on your recent publications of AGS experiments.

Please note that this listing does not include publications (even recent ones)of older AGS experiments which were not left on the books in 1984.

Experiment Publications

723 D.W. Hertzog, et al. (William and Mary/Boston/Carnegie-Mellon/Caltech/Wyoming), Phys. Rev. Lett. 5l_, 1131 (1983), "Precision mea-surement of the magnetic moment of the Z~ hyperon".

734 L.A. Ahrens, et al. (BNL/Brown/Hiroshima/KEK/Osaka/Penn/StonyBrook), Phys. Rev. D35, 785 (1987), "Measurement of neutrino-protonand anti-neutrino-proton elastic scattering".

L.A. Ahrens, et al. Nucl. Instr. Meth. A254, 515 (1987), "A massivefine-grained detector for the elastic reactions induced by neutrinosin the GeV energy region".

L.A. Ahrens, et al. Phys. Rev. D34, 75 (1986), "Determination of theneutrino fluxes in the Brookaven wide-band beams."

L.A. Ahrens, et al. Phys. Rev. Lett. 56., 1107 (1986), "Precisedetermination of sin**2-theta-w from measurements of the differen-tial cross-sections for rauon-neutrino p -*• rauon-neutrino p and anti-muon-neutrino p •*• ant i-muon-neutrino p".

L.A. Ahrens, et al. Phys. Rev. D31, 2732 (1985), "New limit on thestrength of mixing between v and v ".

L.A. Ahrens, et al. Phys. Rev. Lett. 5k_, 18 (1985), "Measurement ofthe ratio of cross-sections for neutrino and anti-neutrino-scatteringfrom electrons".

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Experiment Pub 1 icat ionsaoaxxxx

745 M. May et al. (BNL/CERN/Colurabia), "3d-3p Transition in (li'He1*)"1","Proceedings of Workshop on Fundamental Muon Physics: atoms, nucleiand particles, Los Alamos (1986).

747 A. Etkin, et al. (BNL/CCNY), Phys. Lett. B165, 217 (1985), "Obser-vation of three 2 resonances in the glueball-enhanced channel "p

S.J. Lindenbaum and R.S. Longacre, Phys. Lett. 165B, 202 (1985), "Theglueball resonance and alternative explanations of the reaction if~p

A. Etkin, et al. Phys. Rev. Lett. 49_, 1620 (1982), "The reaction ir~pand evidence for glueballs".

748 P.H. Hansen, et al. (Bohr/Argonne/BNL/Maryland/Miami/Michigan),Phys. Rev. Lett. j>0_, 802 (J983), "Spin effects in p p elastic scat-tering at 28-GeV/c".

749 J.K.. Black, et al. (BNL/Yale), Phys. Rev. Lett. 54_, 1628 (1985),"Measurement of the CP-nonconservation parameter £ /c".

751 No listings.

754 W.H. Bertl, et al. (Vienna/William & Mary/Freiburg/SIN), Kerntechnik43, 184 (1983), "Hyperfine transitions of yd atoms in liquidhydrogen-deuterium mixture".

P. Katmnel, et al. (Vienna, OAW/Zurich, ETH/SIN/William & Mary),Phys. Lett. 112B, 319 (1982), "First observation of hyperfine transi-tions in muonic deuterium atoms via resonant DuD formation at 34-K".

755 G.C. Blazey, et al. (Minnesota/BNL/SE Massachusetts), Phys Rev.Lett. _55_, 1820 (1985), "Hard Scattering with exclusive reactions:ir~p and p meson production".

S. Heppelmann, et al. Phys. Rev. Lett. _5_5_» 1824 (1985), "Decay dis-tribution of high-transverse-momentum p mesons".

766 M. Church et &!. (Columbia/FNAL/Mass/Mexico) "Exclusive CascadeMinus Production in 15-28 GeV Neutron-Proton Interactions," invitedpaper presented at the 23rd International Conference on High EnergyPhysics, Berkeley, CA., July 1986.

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767 T. Armstrong, et al. (Penn State/Ho.nion/Rice/BNL), Phys. Lett.B175, 383 (1986), "A search for narrow states in anti-neutron protontotal and annihilation cross-sections near anti-N N threshold".

769 R.c. U;r.gacre, et al. (BNL/CCNY/Duke/Notre Dame), Phys. Lett. 177B,223 (1986), "A measurement of ir-p + KO-S KO-S n at 22-GeV/c and asystematic study of the 2 + + meson spectrum".

771 D.R. Reeves, et al. (FL State/BNL/Indiana/SE Mass.), Phys. Rev.D34, 1960 (1986), "Spin-parity analysis of pp + E(1420)X".

S.U. Chung, et a1. Phys. Rev. Lett. 55_, 779 (1985), "Spin and parityanalysis of KK~ system in the D and E/iota regions".

773 H. Piekarz, (Brandeis/BNL/Indiana/MIT/Osaka/Houston/Texas/Vassar),Nucl. Phys. A450, 85c, (1986), "Searches for dibaryons of strangeness-1".

774 R.E. Chrien, E.V. Hungerford, and T. Kishimoto, "Continuum Effects andthe Interpretation of E-Hypernuclei." Phys. Rev. C35, 1589 (1987).

776 G. Tzanakos (Colurabia/Illinois/JGhns Hopkins), "Search for neutrinooscillations," Proceedings of BNL Neutrino Workshop, M. Murtagh,editor (1987).

777 Running

778 B.C. Stringfellow et a l . (Purdue/FNAL) NIM A251, 242 (1986), "Ac-ce le ra tor internal ta rge t experiments using a supersonic gas j e t . "

779 Y.Y. Chu and M.C. Zhou (BNL), Phys. Rev. C28_, 1379 (1983), "Idenfica-tion of 2 3 3Ac."

780, 781 Running

782 G.R. Court, et a l . (Michigan/BNL/Maryland/MIT/LNS/Notre Dame/TexasA&M/Zurich, ETH), Phys. Rev. Let t . ^7_, 507 (1986), "Energy dependenceof spin effects in p p + p p".


782 K.A. Brown, et al. (BNL/Michigan/Maryland/Notre Darae/Rice/Texas(con'd) A&M/ETH), Phys. Rev. D3J_, 3017 (1985), "Measurement of p+p + p+p

with a 16.5-GeV/c polarized proton beam".

785 Y.I. Makdisi, (BNL/Minnesota/SE Mass), "Experimental results on spinphysics at the AGS", 7th Int. Symp. on High Energy Spin Physics,Protvino, USSR, September 22, 1986.

787 Running

788

789

J.J. Szyraanski, "Weak Decay of A Hypernuclei." Proceedings of theSecond Conference en Che Intersections between Particle and NuclearPhysics, Lake Louise, Alberta, Canada, May 24, 1986.

J. Sculli, et al. (NYU/BNL), Phys. Rev. Lett _5_i- 1715, (1987),"Limits on 5 (2.2) formation in pp •*• K+K~".

790 L.P. Remsberg, et al. (BNL/Minnesota/SE Mass/MIT), 7th High EnergyHeavy Ion Study, "Stopping power measurements with 17-GeV/c protonsat the AGS or inclusive proton spectra from proton-nucleus inter-actions at 17 GeV/c", R. Bopck, H.H. Gutbrod, R. Stock (eds.),Gesellschaft fuer Schwerionenforschung mbH., Darmstadt, Germany,F.R., March 1985, pp. 439-450.

791, 793 Running

794 P.R. Cameron, et al. (Michigan/BNL/Notre Darae/Maryland/Rice/TexasA&M/Zurich, ETH), Phys. Rev. D32_, 3070 (1985), "Measurement of theanalyzing power for pp • pp at p-transverse**2 = 6.5 GeV/c**2".

D.C. Peaslee, et al. (Maryland/NotreDame/Zurich, ETH/BNL/Michigan),Phys. Rev. Lett. 51, 2359 (1983), "Large p-transverse**2 spin effects

in pp PP"

795 B. Bassalleck (N. Mexico/BNL/Houston/Karlsruhe/Penn S t /Rice) , "SNbound s t a t e s , " Proceedings of 1986 INS Internat ional Symposium onHypernuclear Physics, Tokyo, p. 385.

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796 Y.J. Uemura, et a l . (BNL/William & Mary/Virginia State/George Mason/TRIUMF/Saskatchewan), "Muon spin relaxat ion in CeCu2Si2 and rauonKnight shif t in various heavy-fermion systems", 4th In t . Conf. onMuon Spin Rotation, Relaxation and Resonance, Uppsala, Sweden, June1, 1986.

798, 801,802, 804,805, 806,808, 810,811, 814 Running

816 P. Astier (Boston/BNL/CERN/LPNHE Paris), "Search for neutrino oscil-lations," Proceedings of BNL Neutrino Workshop, M. Murtagh, editor(1987).

817 B.E. Bonner, et al. (Rice/BNL/Johns Hopkins/Houston/SE Massachusetts),Phys. Rev. Lett. 58, 447 (1987), "Spin transfer in hyperon production".

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