SuperB status (process)

SLac July

25,2008

US PI Meeting

Marcello A. Giorgi

Slac- July 25,2008

Marcello A. Giorgi 1

From Elba Dainton Committee has delivered his Report in Short Version.

• Positive outcome: – No objection on the physics program and motivations for high lumi (>10 36 and 75 ab -1 in 5 years) – Polarization an important tool – Very encouraging the positive results from Dafne tests in Frascati.

– No showstopper identified GO AHEAD!

2

SLac July

25,2008 Marcello A. Giorgi

MiniMac in place A Machine advisory committee has been set up by R. Petronzio.

J. Dorfan Chair First meeting in Frascati July 16 and 17 ,2008.

VERY POSITIVE OUTCOME.

I am authorized to make public the closout transparencies of Jonathan

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25,2008 Marcello A. Giorgi 3

Mini-MAC Committee

• Klaus Balewski (DESY) • John Corlett (LBNL) • Jonathan Dorfan (SLAC, Chair) • Tom Himel (SLAC/on sabbatical at DESY) • Claudio Pellegrini (UCLA) • Daniel Schulte (CERN) • Ferdi Willeke (BNL, by phone) • Andy Wolski (Liverpool) • Frank Zimmermann (CERN) (Stuart Henderson was unable to attend)

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25,2008 Marcello A. Giorgi 4

Mini-MAC Charge

(a) to perform an initial assessment of the current design to review its viability to achieve the design operating parameters. This initial assessment would provide clear guidance regarding perceived weaknesses in the design and would further identify those areas in need of more detailed design work and focused R&D. The goal would be to complete this initial review within the next three months (As of June 2008). (b) to provide initial guidance on potential site-specific issues for Super B at the Tor Vergata site.

(c) to provide ongoing, periodic assessments of the design as it matures over the subsequent nine months. 5

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25,2008 Marcello A. Giorgi

NEEDS for Asymmetric machine (7Gev (e-) + 4 GeV (e+)).

• SuperB with peak luminosity of 10 36 s -2 cm -2 , integrating 75 ab-1 in 5 years.

Background not exceeding too much the present Babar, thanks to low current, crossing angle and a careful design of the Interaction Region.

• One beam 80% polarized (High Energy).

• Possibility of running asymmetric at Charm threshold.

(Priorities for design: Taken from Marcello Giorgi’s Talk to Mini-MAC)

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25,2008 Marcello A. Giorgi 6

General Comments

J.D. Closeout report • Very exciting project -- Committee is exhilarated by the challenge • Physics requirement of 10**36 cm -2 is very demanding sec -1 or 75 ab -1 /5yr – Requirement of polarization potentially adds complexity • Imaginative and ambitious design -- Committee endorses the design approach. Design offers flexibility to either raise the luminosity or compensate for surprises • Excellent work by a relatively small group, many of whom have full time “day jobs” • Seeman’s summary – “areas for further concentration”: Committee agrees these cover most of the essential tasks needed before the design can be fully vetted at the 7

SLac July

25,2008 performance requirements

Recommendations

J.D. Closeout report • 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 project is in need of a formal baseline which is managed with change control tools. This cannot be accomplished successfully without the management structure 8

SLac July

25,2008 Marcello A. Giorgi

J.D. Closeout report

Nest Steps for Near-term Work

• The Committee sees no glaring showstoppers with respect to achieving the design performance. However, in several key areas, more work is needed before the design can be blessed • The Committee, in consultation with the SuperB team, established a list of topics that are essential for the team to address before the Mini-MAC will be in a position to state with confidence that the machine can achieve its physics goals. It is the Committee’s opinion that these items can be prioritized in such a way that the machine feasibility can be judged six months from now (This assumes that the management structure is formed by late September and that more resources are provided)

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25,2008 Marcello A. Giorgi 9

Nest Steps for Near-term Work (cont.)

J.D. Closeout report • The Committee focussed on the near-term tasks. The list that follows is by no means the totality of work needed for a TDR

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25,2008 Marcello A. Giorgi 10

Meanwhile Nakada Subcommittee appointed by ECFA Is at work.

They were in Elba and attended the meetings with Labs and agencies.

They met with Steering Committee members Their charge is : • verify the compatibility of SuperB project with the European Priorities for HEP set in Lisbon by Cern Strategy group.

11

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25,2008 Marcello A. Giorgi

INFN National annual Meeting INFN PI and lab directors met for 2 days in Florence (July 2 and 3) to verify priorities in the 3 year plan of INFN.

Official talk on program with accelerators (HEP) given by F. Forti on SuperB.

SuperB is priority #1 of INFN 12

SLac July

25,2008 Marcello A. Giorgi

Funding situation in Italy for R&D is reasonable and coming from different sources.

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25,2008 Marcello A. Giorgi 13

CERN STRATEGY New secretary of European Strategy Group has been appointed Steinar Stepness from Norway.

R. Petronzio and I will meet him next July 31 to update him on the SuperB project and progress and discuss how SuperB is fitting in the agenda for Cern Council Meetings (September2008, December 2008, March 2009) 14

SLac July

25,2008 Marcello A. Giorgi

Next Steps • Report from Nakada will be presented at RECFA meeting in Athens (Oct.08) • KH Meier intends to discuss in the Plenary ECFA in November 28, then give the ECFA recommendation on SuperB to Cern Council.

I expect that we will be asked to make a prsentation in front of Cern Strategy Group in December Council meeting.

15

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25,2008 Marcello A. Giorgi

Physics requirements for

SLac July

25,2008

Marcello A. Giorgi

Università di Pisa & INFN Pisa

SuperB Mini-MAC Frascati July 16-17,2008

Marcello A. Giorgi 16

Great achievements from e+e- factories PEPII and KEKB 3.

4.

5.

6.

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 analysis 2.

2003 Discovery of new charm particles start a new spectroscopy season with D sJ 2004 Direct CP violation in B sector 2006 L imits on MSSM parameters from B  tn 2007 Charm mixing from D 0 2008 h b discovery D 0 bar decay 17

SLac July

25,2008 Marcello A. Giorgi

(Some) Results of B-Factories Unitarity Triangle precision measurements Spectroscopy of new, unexpected states

New DK state(s) at 2.86GeV/c 2

B  tn setting limits on MSSM parameters

D s2 (2573) + Well beyond the original goals

D 0 – D 0 mixing

No Mixing SLac July

25,2008 Marcello A. Giorgi 18

Two frontiers for the exploration of New Physics

Relativistic way Quantum way LHC SLac July

25,2008 Marcello A. Giorgi 19

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

NP( Λ) found at LHC

• Determine couplings FV e CPV of NP • Look for heavier states • Study the flavour structure of NP

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( L ) sensitivity up several tens of TeV. Some channels as t LFV clear segnals of NP 20

SLac July

25,2008 Marcello A. Giorgi

NEEDS for Asymmetric machine (7Gev (e-) + 4 GeV (e+)).

• SuperB with peak luminosity of 10 36 s -2 cm -2 , integrating 75 ab-1 in 5 years.

Background not exceeding too much the present Babar, thanks to low current, crossing angle and a careful design of the Interaction Region.

• One beam 80% polarized (High Energy).

• Possibility of running asymmetric at Charm threshold.

21

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25,2008 Marcello A. Giorgi

Studies with realistic Detector– Reuse parts of Babar Lower boost increases the angular acceptance in c.m.s more hermetic detector.

BASELINE SLac July

25,2008

OPTION

Marcello A. Giorgi 22

Beam pipe at the interaction region Optimal choice for I.R. : Beam pipe radius =1.0 cm First Vertex Layer L0 at 1.5 cm

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25,2008 Marcello A. Giorgi 23

Beam pipe radius 1.5 cm. allows higher sensitivity than in Babar in time dependent analysis, even with a lower energy boost.

B 0 p + bg = 0.28

p -

decay mode

Beampipe 0.424% X 0 Detector tech

: vertical scaling Maps, striplets Hybrid pixel

BaBar

10 m m intrinsic detector resolution 24

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25,2008 Marcello A. Giorgi

Metrology and NP sensitivity in 75 ab-1 scenario Today SuperB+Lattice improvements r h = 0.163 ± 0.028

= 0.344

± 0.016

Improving CKM is crucial to look for NP SLac July

25,2008 r h = ± 0.0028

= ± 0.0024

Marcello A. Giorgi 25

B Physics @ Y(4S) t Physics

SLac July

25,2008 B s Physics @ Y(5S)

© by Ciuchini

Marcello A. Giorgi Charm mixing and CP Charm FCNC 26

SuperB GOLDEN MODES for different scenarios

X X X CKM X X CKM

SLac July

25,2008 X The GOLDEN channel for the given scenario Not the GOLDEN channel for the given scenario but can show experimentally measurable deviation from SM with ≥ 75 ab -1 .

Marcello A. Giorgi X X 27

Higgs-mediated NP in MFV at large tan b 2ab -1 M H ~0.4-0.8 TeV for tan b ~30-60 SuperB 75ab -1 M H ~1.2-2.5 TeV for tan b ~30-60 2ab -1 10ab -1 75ab -1 tan b tan b How signal would like with MH=350GeV tan b -1 Marcello A. Giorgi tan b 28

COMPLEMENTARY: LHC and Flavour with 75 ab -1 IF LHC DISCOVERS SUPERSYMMETRY

SLac July

25,2008 Marcello A. Giorgi Red are LHC+EW constraints+ Super

B

Blue is LHC alone 29

MFV : SNOWMASS points

SLac July

25,2008 Marcello A. Giorgi SPS4 ruled out by present values of B s g . SPS1a is the least favorable for flavour, but SuperB and only SuperB can observe 2 s deviations in several observables 30

MSSM+generic soft SUSY breaking terms Flavour-changing NP effects in the squark propagator  NP scale SUSY mass New Physics contribution (2-3 families)  flavour-violating coupling b ~ b   ~ s

LR

s |  23 |

LR

1

In the red regions the



are measured with a significance >3

s

away from zero

|  23 |

LR

= (0.026 ± 0.005) Arg(  23 ) LR =(44.5± 2.6) o 10 -1 10 -2

m gluino

1 10 (TeV) 1 TeV

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25,2008 Marcello A. Giorgi 31

Determination of coupling [in this case : (  13 ) LL ] with 10 ab -1 and 75 ab -1 SM SM Re (  13 ) LL

SLac July

25,2008 Importance of having very large sample >75ab -1 Marcello A. Giorgi Re (  13 ) LL 32

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

B

+ 

K

+ n n

B

+ 

K *

+ n n

(, K

+ 

K S

p +

)

Actual limit

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25,2008 Marcello A. Giorgi 33

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 D 0 D 0 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 = 10 35 cm -2 s -1 produces ~10 9 DD pairs per month of running. (using Cleo-c cross-section measurement [ s (e + e  D 0 D 0 )~3.6 nb ] +[ s (e + e  D + D )~2.8 nb] ~ 6.4 nb ) • Time-dependent measurements at 4 GeV

only

SuperB to extract Phase .

possible at 34

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25,2008 Marcello A. Giorgi

CP Violation in charm from mixing NOW

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25,2008 Marcello A. Giorgi SuperB 35

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

SuperB lumi at 4 GeV = 10 35 produces ~10 9 cm DD per month -2 s -1 bg bg ct = 0.28  120 m m ~ 30 m m Average flight distance similar to vertex resolution  s t ~ t 36

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25,2008 Marcello A. Giorgi

is also a

t

factory

 golden measurement LFV (Complementarity with m  e g Further improvements if polarized beams.

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

m

from signal: SLac July

25,2008 Marcello A. Giorgi 37

Comparison with Snowmass points on Tau using also Polarization

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

LFV

5

s

disc 1 ÷2

SuperKEKB worse by a factor 2.5 and 4.5 in t mg and >5 in t 3m 38

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25,2008 Marcello A. Giorgi

Tau g-2 Start with the expt. with m

<1

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

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END

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Going beyond MFV

SO(10) MSSM

SUSY GUT

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25,2008

LFV from CKM LFV from PMNS

SuperB M 1/2 Allowed by From B s D phase m Marcello A. Giorgi s now SuperB Recent work :

J.K.Parry, H.-H. Zhang

hep-ph/0710.5443

41

LFV

2 5

s

disc

CMSSM : m  e g vanish at all SPS points

SLac July

25,2008 MVF-NP extentions : m  e g t  mg is independent.

alos vanish s 13  0 42 Marcello A. Giorgi

Charm Physics Charm physics using the charm produced at U (4S) Charm physics at threshold 0.3 ab -1 Consider that running 4 month at threshold we will collect 1000 times the stat. of CLEO-C ~ 10 times of futire BESIII Strong dynamics and CKM measurements D decay form factor and decay constant @ 1% Dalitz structure useful for g measurement x ~1%, @threshold(4GeV) exclusive V ub ~ few % syst. error on g from Dalitz Model <1 o Rare decays FCNC down to 10 -8 D mixing Better studied using the high statistics collected at U (4S)

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25,2008 Marcello A. Giorgi CP Violation in mixing could now addressed 43

Topics Requiring further Study to Establish design-performance feasibility (cont)

J.D. Closeout report – IR design (key issues are achieving low betas, stabilization) • Begin first engineering design considerations to be sure there are no impediments to achieving very low beta and/or the stability needed for collision of tiny beam spots – Injection does not pose the most challenging of SuperB design problems. However, the Committee was not presented with a clear set of design choices. A baseline configuration should be picked which is (a) capable of ensuring small enough charge fluctuations per bunch and (b) which can be be matched to the ring acceptance(s) – Continue making good progress on background simulations

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Additional Feedback from Mini-MAC

• RF – The RF and feedbacks require performance much like PEP II. However the ring impedances must be halved relative to PEP-II. This requires careful study, and constant attention to the details of the vacuum chamber design. The SuperB team must establish an impedance budget and a conscientious impedance-budget manager – Determine the fundamental performance requirements of the coupled-bunch feedback systems. Build what is needed and make it robust, with special attention to protection against noise sources 45

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25,2008 Marcello A. Giorgi

Additional Feedback from Mini-MAC (cont

) • Cloud and Ions

SLac July

– Will require further beam dynamics studies with ECI for e+ and ions for e-. The SuperB teams should take full advantage of the simulation and experimental work at CERN and CESR • Polarization – Decide on the the gun and injector baseline choices – The Committee endorses inclusion of Polarization in the baseline design for the SuperB machine. However, the particle physicists should continue to study the relative importance of the physics gains from polarization, because it could turn out that the inclusion of polarization presents reductions in the peak and/or integral luminosity. The inclusion of polarization is not inexpensive and polarization could become a target if there are ultimately affordability problems Marcello A. Giorgi 46

Additional Feedback from Mini-MAC (cont.)

• Tor Vergata Site – Given the current footprint of the machine, the facility fits comfortably on the site along with SPARX. However there is no room for a major expansion – Details of integration with the SPARX project will need to be carefully developed to avoid compromising the performance capabilities of either facility – Plus: The site is close to major infrastructure, namely LNF and the University – Plus: Its near two major airports. Local food is excellent – The site is crossed by a road: this may be a conflict 47

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Committee Report/Next Meeting

• The Mini-MAC will provide a written report. The goal is to have this completed by the end of August 2008 • The next meeting is anticipated in early 2009

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Topics Requiring Further Study to Establish design-performance feasibility

(Not all topics need to be studied with equal depth. Judgment is left up to the SuperB team) – Beam-beam • further experimental tests of crab waist at DAFNE (to achieve design goals, or understand limitations) – exploit the DAFNE experiment to benchmark and validate the simulation – demonstrate that the crab waist improves the performance • perform strong-strong simulations for SuperB with large Piwinski angle • Evaluate the effect of tolerances and component errors

SLac July

– Low emittance generation, tuning, dynamic aperture • need simulations including effects of crab waist, errors and beam-beam. • Need a table of tolerances • need to optimise dynamic aperture with interaction region 25,2008 (crab waist...) Marcello A. Giorgi 49