26 Sept,2008Marcello A.Giorgi1 1 1 Project of SuperB as Superflavor Factory Marcello A. Giorgi...

26 Sept,2008 Marcello A.Giorgi 1 1

1

Project of SuperB as Superflavor Factory

Marcello A. GiorgiUniversità di Pisa & INFN Pisa

September 26,2008

Novosibirsk-Russia

http://www.unipi.it/princ.html

26 Sept,2008 Marcello A.Giorgi 222

Great achievements from e+e- factories PEPII and KEKB

Flavour Physics was recently in the front line of the stage thanks to the e+ e- factories.

1. 2001 CP violation in B sector from Time dependent analysis2. 2003 Discovery of new charm particles start a new

spectroscopy season with DsJ

3. 2004 Direct CP violation in B sector4. 2006 Limits on MSSM parameters from B5. 2006 UL on decay LFV6. 2007 Charm mixing from D0 D0bar decay

7. 2008 b discovery


(Some) Results of B-Factories

New DK state(s) at 2.86GeV/c2

Ds2(2573)+

Spectroscopy of new, unexpected states

No Mixing

D0 – D0 mixing

B setting limits on MSSM parameters

Unitarity Triangle precision measurements

Well beyond the original goals

What in the next decade will e+ e- factories say about new physics and contribute as complementary to LHC and LHCb ?


Constraints on CKMPrecise measurements of CKM parameters in quark sector, challenging new

physics can come from a wide spectrum of future projects (some approved, some close to approval, some….):

In Kaons there are projects for a next generation of experiments : at Cern(NA62) ,

Kloe at upgraded Dane? K0pi0 like experiment ???).

In charm,and b: • BES upgrade, KEKB upgrade, • Super c- here in Novosibirsk and• SuperB

SuperB and Super c-are based on the crab waist concept invented by P.Raimondi in 2006. Background not exceeding too much the present Babar, thanks to low current, crossing angle and a careful design of the Interaction Region.

4

K 00

LK


Two frontiers for the exploration of New Physics


High Luminosity potential• Flavour precision measurements sensitive to New Physics

(NP)– Measure interference effect in known processes – Measure decays: rare or forbidden in Standard Model

• NP effects governed by– New Physics Scale NP( Λ)– Effective coupling C

• Different Intensities (from interactions)• Different Patterns (for instance from simmetries)

NP(Λ) not found at LHC• Look for indirect signals of NP• Link them to explaining NP models• Constrain regions in parameter space with NP() sensitivity up several tens of TeV.

NP(Λ) found at LHC• Determine couplings FV e CPV of NP

• Look for heavier states • Study the flavour structure of NP

Some channels as LFV clear segnals of NP

With 7-10x1010 pair bb, cc, (75-100 ab-1) it is possible


NP sensitivity with 75 ab-1

SuperB+Lattice improvementsToday

= ± 0.0028 = ± 0.0024

= 0.163 ± 0.028 = 0.344± 0.016

Improving CKM iscrucial to look for NP


Charm FCNC

Charm mixing and CPB Physics @ Y(4S)

Bs Physics @ Y(5S) Physics


some EXAMPLES.


Higgs-mediated NP in MFV at large tan

SuperB -75ab-1

MH~1.2-2.5 TeVfor tan~30-60

tan tan

tan

2ab-1

MH~0.4-0.8 TeVfor tan~30-60

Importance of having very large sample ≥75ab-1

2ab-1 10ab-1

75ab-1

tan

How signal would like with MH=350GeV


Red are LHC+EW constraints+ SuperB

Blue is LHC alone

COMPLEMENTARY: LHC and Flavour with 75 ab-1

IF LHC DISCOVERS SUPERSYMMETRY


SPS4 ruled out by present values of s.

SPS1a is the least favorable for

flavour, but SuperB and only SuperB

can observe 2 deviations in several

observables

MFV : SNOWMASS points


23| |LR

1 10

1

10-1

10-2

(TeV)gluinom

In the red regions the are measured with a

significance >3 away from zero

23| |LR

Arg(23)LR=(44.5± 2.6)o

= (0.026 ± 0.005)

1 TeV

g

sb b s

~

~ ~

New Physics contribution (2-3 families)

LRd

23

MSSM+generic soft SUSY breaking terms

Flavour-changing NP effects in the squark propagator NP scale SUSY mass

flavour-violating coupling


Importance of having very large sample >75ab-1

Im ( 1

3)L

L

Im ( 1

3)L

L

Re (13)LLRe (13)LL

SM SM

Determination of coupling [in this case : (13)LL]

with 10 ab-1 and 75 ab-1


KB

Some comparison: Current 10ab-1 75ab-1

)(,* S

KKKB

Actual limit


Further improvements if polarized beams.

is also a factory golden measurement LFV

Optimization of BKG rejection is in progress. Pol. Helps also to discriminate models. In some model there is a strong effect on the angular distribution of from signal:

(Complementarity with e


Comparison with Snowmass points on Tau using also Polarization

SuperB with 75 ab-1, evaluation assuming the most conservative scenario about syst. errors

LFV

1÷2

5 disc

SuperKEKB worse by a factor 2.5 and 4.5 in and >5 in


Tau g-2

Start with the expt. with

<1

Make use of all the informations (total x-section,angular distribution, f-b asymmetry. Measure Re and Im parts


Charm physics at threshold

D decay form factor and decay constant @ 1% Dalitz structure useful for measurement

0.3 ab-1

Rare decays FCNC down to 10-8

Consider that running 4 month at threshold we will collect 1000 times the stat. of CLEO-C~ 10 times of futire BESIII

~1%, exclusive Vub ~ few % syst. error on from Dalitz Model <1o

D mixing

CP Violation in mixing could now addressed

Strong dynamics and CKM measurements

Charm physics using the charm produced at (4S)

Charm Physics

Better studied usingthe high statistics collected at (4S)

@threshold(4GeV)

@th

resh

old(

4GeV

)


CP Violation in charm NOW

SuperB


Charm

• Charm events at threshold are very clean: pure DD, no additional fragmentation

• High signal/bkg ratio: optimal for decays with neutrinos.• Quantum Coherence: new and alternative CP violation

measurement wrt to (4S). Unique opportunity to measure D0-D0 relative phase.

• Increased statistics is not an advantage running at threshold: cross-section 3x wrt 10GeV but luminosity 10x smaller.

• SuperB lumi at 4 GeV = 1035 cm-2s-1 produces ~109 DD pairs per month of running. (using Cleo-c cross-section measurement

(e+e-D0D0)~3.6 nb + (e+e-D+D-)~2.8 nb ~ 6.4 nb)• Time-dependent measurements at 4 GeV only possible at SuperB.


SuperB nominal boost

ct = 0.28 120 m ~ 30m

Average flight distance similar to vertex resolution t~

Resolution is still adequate for time dependent measurements

Error on lifetime (wrt perfect resolution) 2 t

2

N 2

N

Time dependent measurements at DD threshold: only possible at SuperB

• Proper time resolution dominated by decay vertex resolution. – Production vertex precisely determined thanks to nm beamspot dimensions

SuperB lumi at 4 GeV = 1035 cm-2s-1 produces ~109 DD per month


Luminosity•For gaussian bunches:

geometrical

Reduction factor

Ne+ ( Ne

- ) is the number of positrons (electrons) in a bunch

fcoll is the collision frequency

σx (σy) is the horizontal (vertical) r.m.s. size at the I.P.

Rl is the Luminosity Reduction factor by incomplete overlap: crossing angle and “hour glass” effect.

•TRADITIONAL (brute force): increase the numerator Currents increase: from 1A on 2 A up to 4.1 A on 9.4 A- Wall Plug Power, HOM,CSR: hard to surpass 5 1035 cm2s-1 Crab Crossing to increase Rl and to optimize beam dynamic•SuperB: decrease the denominator (same currents as PEP-II) Bunch sizes: from σy = 3μm down to σy = 40 nm Luminosity: 1036 cm2s-1 ( baseline) . Crab Waist and large Piwinsky angle to optimize beam dynamic


CRAB WAIST

M.Zobov will talk in detail about

crab waist and the Dane test.


CRAB WAIST TEST IN FRASCATI

y ymeas 0.88

y yp2 ye

2

y 3.5mVertical scan

26 Sept,2008 Marcello A.Giorgi 26 Sept 9,2008 Marcello A. Giorgi26

SuperB Test of crab waist at Dane (LNF)

Transverse beam dimensions at the Synchrotron Light Monitor

LUMINOMETERS

Blow-up in beam sizes and decrease in Bhabha rates observed when crab sexts for one ring OFF (other ring ON)

Crab ON

Crab OFF

e-

e+

x y

Luminosity stable above 2.0x1032 reached


SuperB parameters with higher Wall Power

Doubling currents with a factor 2 in Wall power we can double the luminosity

150m needed for Polarization

LEBHEB

Asymmetric bunch size to optimize beam lifetime (Touschek effect)


SuperB expected LUMI

After 7th year integrated Luminosity can grow at rate of 40 ÷ 60 ab-1/year

Integrated Luminosity(1/ab)

0.00

20.00

40.00

60.00

80.00

100.00

120.00

140.00

>80ab-1 in 7th year

Peak Luminosity (10^35)

0.00

5.00

10.00

15.00

20.00

25.00

30.00


29

Super flavor factory projects

Machine project Cms Energy

(GeV)

Mode Polarization

of e- beam >80%

for

Luminosity

(cm-2 s-1)

Super c-BINP (Russia)

3.0÷4.5 Symmetric Yes 1÷2 1035

SuperKEKB

(Japan)10.58 Asymmetric No 2÷8 1035

SuperB-

Roma10.58

4.0

Asymmetric Yes 1÷4 1036

1 1035


SuperB

SuperB is an asymmetric collider (7GeV e- ,4GeV e+)

Baseline peak luminosty 10 36 (upgradable).

15-60 ab-1/year as dictated by the physics program.

e- beam longitudinally polarized (85%).

Possibility of operating (ASYMMETRIC) at threshold for D0 CP violation studywith time dependent analysis.

COMPLEMENTARY to a Super c- symmetric factory.


Detector Layout – Reuse parts of Babar

OPTION

BASELINE

Geant4 model

Silicon Vertex TrackerMAPS pixel devices: resolution, efficiency, readout speed (now under test at CERN !)Advanced trigger systems (Associative Memories)

Drift ChamberCell size, shape, and gas mixture

Particle ID system (forward system)Radiators (Aerogel, NaF) Photon detector (MCP, MAPMTs, SiPM)Timing for TOF system

Electromagnetic CalorimeterForw: LYSO Crystals leakage, resolution, mechanical structureBack: Lead-scintillator calorimeter resolution

Instrumented Flux ReturnScintillator, fibers, photon detector, readout electronics

Test beam goals for 2008-2010


Beam test on MAPS for layer 0

• Beam test started last week @ CERN (T9). Main goals:– DNW MAPS matrix resolution & efficiency– Thin (200 m) striplets module with FSSR2 readout chips– Demostrate LVL1 capability with tracker information sent to

Associative Memories – New DAQ system developed for data push architecture

beam

T-1,2,3,4 :reference telescope modules

S1

S2

S3

T-2,1T-4,3

Striplets-1

Striplets-2

MAPS-1

MAPS-2


PROCESS

SuperB process is going on after the scrutiny of many international committees.


Reviews summaryINFN Internation Review Comm

– John Dainton – UK/Daresbury, chair– Jacques Lefrancois – F/Orsay– Antonio Masiero – I/Padova– Rolf Heuer – D/ Desy– Daniel Schulte – CERN– Abe Seiden – USA/UCSC– Young-Kee Kim – USA/FNAL– Hiroaki Aihara – Japan/Tokyo+ Tatsuya Nakada (RECFA)+ Steve Myers – accel expert

Report released May 2008recommend strongly continuation of work for 1036 cm-2 s-1 asymmetric e+e- collider

RECFA Committee– Tatsuya Nakada– Yanis Karyotakis– Frank Linde– Bernhard Spaan

SuperB presented twice at ECFAPresentation fall 08 to CERN strategy group

- chair Steinar Stapnes

DOE Particle Physics Project Prioritization Panel (P5)

Report released May 2008Recommend significant US Participation in offshore flavour factory in the intermediate funding scenario

Mini Machine Advisory Commitee– Klaus Balewski (DESY)– John Corlett (LBNL)– Jonathan Dorfan (SLAC, Chair)– Tom Himel (SLAC/ DESY)– Claudio Pellegrini (UCLA)– Daniel Schulte (CERN)– Ferdi Willeke (BNL)– Andy Wolski (Liverpool) – Frank Zimmermann (CERN)

First meeting in July 16-17,2008No glaring showstoppersForm a management structure


Comments on reviews

• Link to meetings and reports:http://www.pi.infn.it/SuperB/reviews

• Dainton committee • Mini MAC

J ohn DaintonI NFN SuperB

La BioladaJ une 1st 2008

5. Conclusion

● recommend strongly continuation of work f or 1036 cm- 2 s- 1 asymmetric e+e- collider

● even more concerted eff ort to f ully evaluatephysics potential ↔ machine specifications

● major design program to establish credibilityof machine now critical ← showstoppers?

● MAC now essential● preservation of detectors

PEP2 components

increasing global involvement if timescale f ora TDR is to be met

I RC First reportI RC First report

•Very exciting project -- Committee is exhilarated by the challenge•Physics requirement of 10**36 cm-2 sec-1 or 75 ab-1/5yr is very demanding•Committee considers the SINGLE MOST ESSENTIAL ingredient for moving forward is the formation of a sanctioned management structure which formally incorporates a dedicated machine design team. The team members must have the strong support of their home institutions to work on the design. The team needs a designated leader, who is as close to full time as is possible

•The Committee sees no glaring showstoppers wrt achieving the design performance. However, in several key areas, more work is needed before the design can be blessed

http://www.pi.infn.it/SuperB/reviews

http://www.pi.infn.it/SuperB/reviews


The processSuperB presented twice at ECFARECFA Committee

– Tatsuya Nakada– Yanis Karyotakis– Frank Linde– Bernhard Spaan

RECFA meeting in Athens October ’08 Plenary ECFA Nov . 28,2008Final report to Cern Strategy Group at the

December Council meeting.

Project has been presented last Friday Sept 19 by R. Petronzio at the CERN council. Discussion already with the Cern Strategy group secretary Steiner Stapness.

FINAL REPORT EXPECTED BY MARCH 09.

MEANWHILE we are elaborating the management structure of SuperB


END

26 Sept,2008 Marcello A.Giorgi 40Marcello A. Giorgi

4040

Charm

• Charm events at threshold are very clean: pure DD, no additional fragmentation

• High signal/bkg ratio: optimal for decays with neutrinos.• Quantum Coherence: new and alternative CP violation

measurement wrt to (4S). Unique opportunity to measure D0-D0 relative phase.

• Increased statistics is not an advantage running at threshold: cross-section 3x wrt 10GeV but luminosity 10x smaller.

• SuperB lumi at 4 GeV = 1035 cm-2s-1 produces ~109 DD pairs per month of running. (using Cleo-c cross-section measurement [(e+e-D0D0)~3.6 nb ] +[ (e+e-D+D-)~2.8 nb] ~ 6.4 nb)

• Time-dependent measurements at 4 GeV only possible at SuperB to extract Phase .

26 Sept,2008 Marcello A.Giorgi 41 Sept 9,2008 Marcello A. Giorgi41

Marcello A. Giorgi41

CP Violation in charm from mixing NOW

SuperB

26 Sept,2008 Marcello A.Giorgi 42 Sept 9,2008 Marcello A. Giorgi42 LNF July 16,2008 Marcello A. Giorgi42

Time dependent measurements at DD threshold:only possible at SuperB

• Proper time resolution dominated by decay vertex resolution. – Production vertex precisely determined thanks to nm beamspot dimensions

SuperB nominal boost

ct = 0.28 120 m ~ 30m

Average flight distance similar to vertex resolution t~

With SuperB lumi at 4 GeV = 1035 cm-2s-1 expected ~109 DD per month


Crab Waist

• Crab waist: modulation of the y-waist position, particles collides a same βy realized with a sextupole upstream the IP.

• Minimization of nonlinear terms in the beam-beam interaction: reduced emittance growth, suppression of betatron and sincro-betatron coupling

• Maximization of the bunch-bunch overlap: luminosity gain

• Low wall power


Luminosity and specific luminosity with and without Crab Sextupoles


SVT - Layer 0 Options

Striplets option: mature technology, not so robustagainst background.• Marginal with background rate higher than ~ 5 MHz/cm2

• Moderate R&D needed on module interconnection/mechanics/FE chip (FSSR2)

CMOS MAPS option • new & challenging technology:• can provide the required thickness • existing devices are too slow• Extensive R&D ongoing (SLIM5-Collaboration) on

3-well devices 50x50um2

Hybrid Pixel Option: tends to be too thick.• An example: Alice hybrid pixel module ~ 1% X0 • Possible material reduction with the latest

technology improvements• Viable option, although marginal

PREAMPL

SHAPER

DISC LATCHPREAMPL

SHAPER

DISC LATCH

• The BaBar SVT technology is adequate for R > 3cm: use design similar to BaBar SVT

• Layer0 is subject to large backround and needs to be extremely thin: > 5MHz/cm2, 1MRad/yr, < 0.5%X0

G.Rizzo

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