FAIR (Facility for Antiproton and Ion Research) (Darmstadt, Germany)
PANDA at FAIR Facility for Antiproton and Ion Research
description
Transcript of PANDA at FAIR Facility for Antiproton and Ion Research
Workshop JINR/BMBF 18.Jan.05, H.O.
PANDA at FAIRFacility for Antiproton and Ion Research
Herbert OrthGSI Darmstadt
Workshop JINR/BMBF 18.Jan.05, H.O.
Quantum chromodynamics at short distances S << 1 Quantum chromodynamics at short distances S << 1
quantitative description of the experimental cross section over
10 orders of magnitude by perturbative QCD!
jet transverse energy
perturbative treatment
jet production in pp-collisions at = 1.8 TeV (Fermilab)s
p p
Example:
Workshop JINR/BMBF 18.Jan.05, H.O.
Transition from the perturbative to the non-perturbative regime of Quantum Chromodynamics (QCD)
Transition from the perturbative to the non-perturbative regime of Quantum Chromodynamics (QCD)
q
q q
qgluon (g)
quarks, gluonsone gluon exchange
hadrons:baryons, mesonsmodels, lattice QCD
perturbativeQCD: S << 1
non-perturbativeQCD: S 1
Workshop JINR/BMBF 18.Jan.05, H.O.
Challenging problems in non-perturbative QCDChallenging problems in non-perturbative QCD
• Do glueballs (ggg) and hybrids (qqg) exist?
New experimental approach: antiproton beams up to 15 GeV/c
• Why are quarks confined within hadrons?
• How are hadrons constructed from their constituents?
• What is the relation of parton degrees of freedom and the low energy structure of hadrons?
• What is the origin of hadron masses?
• How are hadrons modified when embedded in nuclei?
Workshop JINR/BMBF 18.Jan.05, H.O.
SIS 100
HESR
SIS 300
CBM
PP Super-FRS
Atom. Phys.
GSI as of today
Elec.CoolerPANDA
CR+RESR
NESRFLAIR
FAIRFacility for Antiprotonand Ion Research
Workshop JINR/BMBF 18.Jan.05, H.O.
High Energy Storage Ring (HESR) and Detector ConceptHigh Energy Storage Ring (HESR) and Detector Concept
electron cooler
universal detector PANDA
p-injection
circumference 540 m
max. bending power 50 Tm
HESR
p
detector features:measurement and identification of, e , , , K, p, phigh rate capabilityfast trigger scheme
54p/p
cGeV151.5pp1s2cm32102L
1010p/p
N = 1011 p
Workshop JINR/BMBF 18.Jan.05, H.O.
Physics program at the High Energy Storage Ring (HESR)Physics program at the High Energy Storage Ring (HESR)
J/ spectroscopy confinement
hidden and open charm in nucleiglueballs (ggg)
hybrids (ccg)
strange and charmed baryons
in nuclear field
inverted deeply virtual Compton scattering
CP-violation (D/ - sector)
New proposals: ASSIA, PAX (pol. target; pol. p – beams)
Workshop JINR/BMBF 18.Jan.05, H.O.
Quantumelectrodynamics (QED)Quantumelectrodynamics (QED) Quantumchromodynamics (QCD)Quantumchromodynamics (QCD)
( )r
crV
hα−=
( )rV
r
( ) rKr
c
3
4rV S ⋅+α−=
h
( ) ∞→∞→ rforrV
confinement potential
( )rV
Masse / MeV
2900
3100
3300
3500
3700
3900
4100
( )3730DD
)3097(
)3686(')3770(''
)4040('''
)3525(hc )3510(1χ)3556(2χ
)3415(0χ
)3590('cη
)2980(cη
1D23D2
3P0(~3800)3P1(~3880)
3P2(~3940)
terra incognita
cc
Charmonium
1fm
Charmonium ( c c )Positronium (e+e–)
ionisation energy
binding energy meV
0
-1000
-3000
-5000
-7000
+e −e
Positronium
0.1nm1S0
1S0
1S0
3S1
3S11P1 3P1
3P0
3P2
Workshop JINR/BMBF 18.Jan.05, H.O.
comparison e+e- versus ppcomparison e+e- versus pp
e+e- interactions: only 1-- states formed other states populated in secondary decays (moderate mass resolution)
pp reactions: all states directly formed (very good mass resolution)
production of χ1,2
'ee →−+
2,1χ
/J−+ ee
formation of χ1,2
/J−+ ee
2,1pp χ→
Crystall Ball
E 760 (Fermilab)
m (beam) = 0.5 MeV
Workshop JINR/BMBF 18.Jan.05, H.O.
• energy levels, widths, decay modes
details of QQ interaction non-perturbative effects
charmonium spectroscopy: testing confinementcharmonium spectroscopy: testing confinement
unique window to study interplay of perturbative and non-perturbative effects
open problems in J/ spectroscopy:
• search for ηc'-state (seen Belle e.o.) • confirm 1P1-state • measure transition rates • identify states above DD threshold
advantage pp: direct formation of all states
confinement potential spin dependend ?
Workshop JINR/BMBF 18.Jan.05, H.O.
GlueballsGlueballs
characteristic feature of QCD: self-interaction among gluons
predicted masses: 1.5 - 5.0 GeV/c2
candidate: f0(1500): 0++; =110MeV no flavour blind decay mixing with neighbouring scalar meson states
search for higher lying glueball states
mixing with (qq) and (QQ) excluded for exotic states (e.g., JPC = 2+-)
less mixing, width 100 MeVonly 10 (QQ) states in 3 – 4 GeV/c2
C.J. Morningstar and M. Peardon,PRD60 (1999) 034 509decay mode: 2+- η ( l = 2)
Workshop JINR/BMBF 18.Jan.05, H.O.
predicted masses: 3.9 - 4.5 GeV/c2
lowest state: JPC = 1–+ (exotic)width: could be narrow (LGT: 10 MeV)preferred decays:(ccg) (cc) + X
light quark hybrids:
charmed hybrids:
candidates:JPC = 1–+ at 1.4 GeV/c2 η–
JPC = 1–+ at 1.6 GeV/c2 0–
Hybrids Hybrids )qgq( *
e.g. 1-+ χc + ()l=0 (C. Michael, hep-lat/0207017)
J/ + e+e-
Workshop JINR/BMBF 18.Jan.05, H.O.
Str
ange
sess
Neutron Number
three-dimensional nuclear chart with strangeness degree of freedomthree-dimensional nuclear chart
with strangeness degree of freedom
• strange and doubly strange nuclei• YN-interaction
Workshop JINR/BMBF 18.Jan.05, H.O.
Double Hypernucleus SpectroscopyDouble Hypernucleus Spectroscopy
double hypernuclens productiondouble hypernuclens production detector schemedetector scheme
¯(dss) p(uud) (uds) (uds) applying K-trigger: 3 • 105 stopped ¯ /ddetected -transitions: 100 / dkeV-resolution !!
Rates:
Workshop JINR/BMBF 18.Jan.05, H.O.
CP-violationCP-violation
• CP-violation observed in the s, b-sector• not sufficient to explain observed matter
CP-violation in c-sector? e.g. compare decay rates+−++ → KKD to −+−− → KKD
f f
; expected ACP 10-3 ( D+ f ) – ( D– f )
( D+ f ) + ( D– f ) ACP =
copious production of D-mesons
2.5 ·109 D pairs/year D 2.5 ·107 reconstructed D, /yearD
for L = 2 · 1032 cm-2s-1 2 years of data taking to achieve 3 statistical significance
HESR:
Workshop JINR/BMBF 18.Jan.05, H.O.
Access to Generalized Parton DistributionsAccess to Generalized Parton Distributions
Identical diagram
(reversed)
non-perturbative QCD
pQCD
( )t,,xE,H ξ
( )t,,xE~
,H~
ξ
p
p
factorization into hard amplitude (calculable in perturbative QCD)
and soft amplitude
(information on parton distributions)exclusive annihilation :→pp
wide angle Compton scattering:
• clear experimental signature;both baryons in ground state
• cross section: 2.5 pb
⇒−−⋅= 1s2cm32102Lfor
O (103) events per month
(at | u |, | t | s 10 GeV2)
A. Freund et al, PRL 90 (2003) 092001
Workshop JINR/BMBF 18.Jan.05, H.O.
detector features:
• tracking of charged particles
• measurement and PID of , e, , , K, p, p
• high rate capability
• sophisticated and fast trigger scheme
The PANDA detectorThe PANDA detector
central detector and forward spectrometer
Workshop JINR/BMBF 18.Jan.05, H.O.
Target SpectrometerTarget Spectrometer Target pipe
Muon hodoscope
Straw chamber
Si vertex detector
Ecal
Barrel DIRC
Magnet yoke
Solenoid Magnet coil
Ecal
Minidrift
Forward DIRC
p
TOF Barrel
Workshop JINR/BMBF 18.Jan.05, H.O.
Forward SpectrometerForward Spectrometer
Minidrift
Dipole magnet yokeMuon chambers
Ecal
Hcal
Gas Rich
Coils
TOF
Workshop JINR/BMBF 18.Jan.05, H.O.
41 Institutes (33 Locations) from 10 Countries:Austria - Germany - France - Italy - Netherlands - Poland - Russia - Sweden - U.K. -
U.S.
IKP Jülich I + IIU KatowiceLANL Los AlamosU MainzTU MünchenU MünsterBINP NovosibirskU PaviaParis OrsayU of SilesiaU TorinoPolitechnico di TorinoU & INFN TriesteU TübingenU & TSL UppsalaÖAdW ViennaSINS Warsaw
U BochumU BonnU & INFN BresciaU CataniaU CracowGSI Darmstadt TU DresdenJINR Dubna I + IIU ErlangenNWU EvanstonU & INFN FerraraU FrankfurtLNF-INFN FrascatiU & INFN GenovaU GlasgowU GießenKVI Groningen
The PANDA colaborationThe PANDA colaboration
Workshop JINR/BMBF 18.Jan.05, H.O.
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Plan view of the PANDA detectorPlan view of the PANDA detector
Workshop JINR/BMBF 18.Jan.05, H.O.
FAIR: Facility for Antiproton and Ion Research
Workshop JINR/BMBF 18.Jan.05, H.O.
General FAIR slides
Workshop JINR/BMBF 18.Jan.05, H.O.
Primary Beams
•1012/s; 1.5 GeV/u; 238U28+
•Factor 100-1000 over present in intensity•2(4)x1013/s 30 GeV protons•1010/s 238U73+ up to 25 (- 35) GeV/u
Secondary Beams
•Broad range of radioactive beams up to 1.5 - 2 GeV/u; up to factor 10 000 in intensity over present •Antiprotons 3 - 30 GeV
•Cooled beams•Rapidly cycling superconducting magnets
Key Technical Features
Storage and Cooler Rings
•Radioactive beams•e – A collider
•1011 stored and cooled 0 - 14.5 GeV
antiprotons
FAIR: Facility for Antiproton and Ion ResearchFAIR: Facility for Antiproton and Ion Research
Workshop JINR/BMBF 18.Jan.05, H.O.
FAIRFacility for Antiproton and Ion Research
research areas:
• Nuclear Structure Physics and Nuclear Astrophysics with Radioactive Ion-Beams
• Hadron Physics with p - Beams
• Physics of Nuclear Matter with Relativistic Nuclear Collisions
• Plasma Physics with highly bunched Laser- and Ion-Beams
• Atomic Physics and Applied Science
• Accelerator Physics
Workshop JINR/BMBF 18.Jan.05, H.O.
synergy effect: parallel operation of physics programssynergy effect: parallel operation of physics programs
Workshop JINR/BMBF 18.Jan.05, H.O.
FAIR and its members
FAIR ProjectFrance
FZ-Jülich
Russia
INDIAItaly
Resources, Finances, Manpower and Hardware Contributions
Demands of the Project towards partners
UK
SwedenChina
GSI
FAIR Council(Representatives of Institutions)
France FZ-Jülich RussiaFinnland Spain UKSwedenGSI
Project Management
Italy
Finnland
Obs. EU
Obs. China
Obs. India
Observ. USA
Workshop JINR/BMBF 18.Jan.05, H.O.
Workshop JINR/BMBF 18.Jan.05, H.O.
The PANDA DetectorThe PANDA Detector
target spectrometer forward spectrometer
micro vertexdetector
electromagneticcalorimeter
DIRC:Detecting InternallyReflectedCherenkov light
straw tubetracker
mini driftchambers
muon counter
Solenoidalmagnet
iron yoke