CSN1-Napoli-19 Settembre 2005

Babar: Stato e Prospettive

Giancarlo PireddaINFN Sezione di Roma La Sapienza

PEP-II Safety Planning and Restart

• October 11, 2004 Electrical accident at SLAC. All running of accelerators stopped.

• Safety training with new procedures October 2004 – March 2005.

• Type A Investigation October-December, 2004.• Corrective Action team: December 2004-January 2005.• Restart Validation Review: February 2005.• “Pre-restart” conditions completed March 2005.• Linac and PEP-II operations start up April 15, 2005.• Power outage: May 18-20. Beams returned May 25.• FFTB beam line revalidated June 2, 2005. • ESA beam line revalidation is in final stages. (July 2005)

Cronistoria degli eventi (J.Seeman IFC di Luglio)

Babar Run5

PEP-II

• Peak Luminosity– Run 5 record is 8.5*10**33 (was 9.2 in May

2004)– Rather smooth running (when trees don’t fall)

• Carnet des doleances– RF relialibility– Klystrons (no spare!)– Beam Position Monitors heating problem LER bunch lenght affected Plan for repair in Fall 2006

• October short down– PPS certification (Linac and Pep-II)– Replacement of Q5L vacuum chamber– DCH readout board replacement

PEP-II Run Schedule 2005-08

• Collide steadily from April 2005 through July 2006 with a “one month break” in October 2005. (Present: October 3 through November 4, 2005)

• 2006 Down is August through November for BaBar, PEP-II, and LCLS upgrade work.

• Three month down in Summer-Fall 2007 for LCLS work.

• Collide through September 2008.

Overall Parameters and Goals

Parameter Units DesignBest in collision

Future 2007 goal

I+ mA 2140 2450 4500

I- mA 750 1550 2200

Number bunches

1658 1588 1715

y* mm 15-20 11 8.5

Bunch length mm 15 11-12 9

y 0.030.043-0.065

0.055-0.07

Luminosity x1033 3.0 9.2 21

Int lumi / day

pb-1 130 710 1300Over five times design!Over three times design

Twice design

Expected PEP-II Delivered Integrated Luminosity (July 2005)

End of fiscal yearTotal PEP-II Projection

Delivered

“Yearly change”

Peak

Luminosity

x 1033

FY2004 256/fb 117/fb 9.2

FY2005 318 62 10

FY2006 474 156 11

FY2007 671 197 20

FY2008 1046 375 21

Projection July 2005

Daily Luminosity

SVT: il detector e’ sostanzialmente stabile

3/104 sezioni non acquisiteForward

Layer 5 noisy

module

Layer 3 ROS z-side short

Backward1/104 sezioni non acquisite

Layer 2 ROS phi-side short

8 chips z fuori dal DAQ dopo un incidente dovuto alla condensadi umidita’: recupero in fase di studio

DCH electronics upgrade

• Motivation: – Reduce deadtime due to

serialization and shipping of data from DIOM to ROM

• Upgrade in two steps:– Phase 1 (summer 2004)

• Ship only 1/2 waveform information (3216 bytes) from frontends

• No change observed with data– Phase 2 (Oct 2005)

• Larger FPGA for feature extraction before transmission hardware change

• New boards in production

LSTs are fully operationalwire holders

LST sextants

Efficiency curves from Run 5 data

RPC sextants

After one year operation only 5/1550 wires have problems

Humid IFR GasApr. 24 July 7

Layer 13Layer 13

Layer 16

Humid gas since Feb. 18

Humid gas since May 5

Humid gas since June 8

Efficiency per Day (%)

Dopo cinque anni di Run ancora in ottima

Salute!

Come stiamo con la produzione di Fisica?

• A few comments from the Summer Conferences 2005– Even without new data (<17 fb-1 from Run 5 by July 1):

65 conference papers to LP05! More new results for EPS.• New channels added to high profile results

– KsKsKs( with one Ks->pi0pi0)00

• Much progress of Vub and inclusive b -> s spectrum• Discovery of a new & unusual heavy state at 4.260

GeV/c2 in ISR events• Expectations for Summer 2006

– Summer 2006 data samples will be comparable with Belle, given the long continuous run & luminosity improvements planned

• BABAR results for Penguin modes should be better than Belle (comparable if Belle analysis improved)

Physics goals & expectations• Goal for 2005-2006: double current data set

– Delay in Run 5 can be overcome by summer 2006 with extended running period, with substantial reduction in errors on CP violation asymmetries in rare decay modes

– Error on average of Penguin modes should reach 0.06

• Goal for 2007-2008: double again to ~1 ab-1

– Individual Penguin modes with errors in range 0.06-0.12

– Suite of fundamental Standard Model measurements with substantially improved levels of precisionSensitivity to New Physics through rare decays,

CP violation and large data sample

Competition: Better physics performance (e.g S the sine amplitude)

Errors/LuminosityS Belle BABAR Belle BABAR

Mode S stat err lumi

Untag sample S stat err lumi

Untag sample st*sqrt(L) st*sqrt(L)

Perf Ratio

Lumi Ratio

phiK0 0.060 0.330 253 175 0.500 0.250 205 212 5.249 3.579 1.466 2.150etapK0 0.650 0.180 253 512 0.270 0.140 205 819 2.863 2.004 1.428 2.040KKK0 0.490 0.180 253 399 0.550 0.170 205 452 2.863 2.434 1.176 1.384f0K0 -0.470 0.410 253 102 0.950 0.320 192 152 6.521 4.434 1.471 2.163pi0K0 0.300 0.590 253 173 0.350 0.300 205 300 9.385 4.295 2.185 4.773ccbarK0 0.728 0.056 140 5417 0.722 0.040 205 10320 0.663 0.573 1.157 1.339pipi -1.000 0.210 140 373 -0.300 0.170 205 467 2.485 2.434 1.021 1.042rhopi S -0.280 0.230 140 483 -0.100 0.140 192 1184 2.721 1.940 1.403 1.968rhopi A+- -0.020 0.160 140 483 -0.210 0.110 192 1184 1.893 1.524 1.242 1.543rhopi A-+ -0.530 0.290 140 483 -0.470 0.140 192 1184 3.431 1.940 1.769 3.129Averages 1.432 2.153

Typically better errors for BABAR despite larger Belle

dataset

Normalized performanc

e ratio

Bottom line: BABAR is getting the equivalent of a factor of 2 in luminosity through better

analysis/detector performance

Projections of data sample growth

Run 5: Apr 05-Jul 06

Double data by summer 2006

4 month LST

down

Double again by Sep 2008

1 month PPS

down

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Projectons Summer 2008

K*

5 discovery region if non-SM physics is 0.30 effect

2004=240 fb-1

2008=1.1 ab-1

Golden modes reach 5

sigma level

Projections are statistical errors only; but systematic errors at few percent

level

Luminosity expectation

s:

20082004

( ) 0.30S f0KS

KS0

KS

’KS

KKKS

Projected Uncertainties of UT Parameters

(two B-factories with comparable lumi )

-LHCb will need to run three years (design lumi) to achieve the 2008 precision-No future experiment will be able to measure Vub with comparable precision-For several NP models the deviations of the CP violation in b-> s penguin modes can be 20%.

Babar Physics Reach Assessment

PEP-II/BABAR run plan for 2005-2008

• Run 5: Apr 2005 to July 31, 2006– Down for month of October for PPS certification, Linac &

PEP-II safety issues, DCH readout phase 2, LST preparations– Run through holidays in Dec 2005

• LST installation down: Aug 1 to Nov 30, 2006– Installation of remaining 4 barrel sextants of the IFR– Installation of PEP-II vacuum upgrades and rf-station– LCLS construction and installation

• Run 6: Dec 1, 2006 to Aug 31, 2007– Down for Sep-Nov 2007 for LCLS construction & installation– Run through holidays in Dec 2006

• Run 7: Dec 1, 2007 to Sep 30, 2008– Run through holidays in Dec 2007

P5 ChargeParticle Physics Project Prioritization Panel

Current planning calls for PEP-II to be operated until the end of FY2008 at the latest, and the Tevatron collider to be operated until

the end of FY2009. What factors or considerations might lead to stopping B Factory operations one year, or two years earlier than

planned? When would we be in a position to make such a determination and what information would be needed?

Timescale

Final version of June 8

o Membership finalized o Inaugural meeting late Augusto Visit to Fermilab in September 8-9o Visit to SLAC in early October 6-7o Report by end of year

Next IFC meeting January 20-21

CSN1-Napoli-19 Settembre 2005

Conclusioni• Run 5 iniziato, stiamo accumulando

luminosita’- sia pure con qualche ritardo e lentezza - Pep-II ha un programma di upgrade e superamento problemi

• Detector: ottimo stato, ottima efficienza– previsto upgrade IFR

• Stato della Collaborazione piu’ che buono - molti nuovi risultati presentati ai congressi estivi

• Programma di Fisica, interessante, competitivo e con mete realistiche

• ...speriamo di poterle raggiungere

Back up slides

                                                                                P5 Agenda

October 6-7Redwood Rooms at SLAC

                                                                                                                                                                Time

Speaker Duration Topic

October 6      

8:30-9:00   30 Executive Session [closed]

9:00-9:45 Jonathan Dorfan 45SLAC Long-Range Plan and the BABAR Program

9:45-10:30 John Seeman 45 PEP-II performance and goals

10:30-11:00   30 Break

11:00-11:45 David MacFarlane 45Overview of BABAR physics goals and plans

11:45-12:15 Zoltan Ligeti (tbc) 30SM opportunities in heavy flavor physics

12:15-12:40 Jeff Richman 25CP violation  and rare decay physics with BABAR

12:40-13:30   50 Lunch

13:30-14:00 Luca Silvestrini 30 New physics in heavy flavors

14:00-14:25 Riccardo Faccini 25New physics sensitivity with BABAR

14:25-15:10 Steve Olsen 45 Review of Belle plans and goals

15:10-15:30   20 Break

15:30-15:45 TBA 15Perspectives of the US BABAR community

15:45-16:00 Marcello Giorgi 15Perspectives of the International BABAR community

16:00-17:30   90 Executive session [closed]

17:30-19:00   90 Reception

October 7      

8:00-9:00   60Breakfast with Executive Board members

9:00-11:00 BABAR & SLAC management 120 Questions and answers [closed]

11:00-14:30   150 Executive session [closed]

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Future PEP-II Improvement Activities

• New transverse digital feedback processors (Summer 2005)

• New RF comb filters (Fall 2005)

• New klystron linearizer (Spring 2006)

• Install LER-5 RF station (Fall 2006)

• Install HER-10 RF station (Fall 2006)

• Upgrade several high-power IR vacuum chambers (Q2, Q4, Q5, Q2 bellows, LER abort spoiler, straight section bellows …) (Fall 2006)

• HER lattice upgrade for lower momentum compaction and shorter bunches (Fall 2006)

• Fix LER BPM heating issue (Fall 2006 if not before).

IFR upgrade with LSTs

Bottom & top sextants installed summer 2004Remaining sextants delayed until summer 2006

Sextant 1 wires digi map

L3 M5 T2 P2

L3 M5 T3 P2, 3 & 4

The missing channels

At one year from the installation 5 wires over 1552 are in a hospital PS at lower voltage.

Few other HV channel are connected in the hospital PS (no loss of efficiency).

The problem of the hospitalized channels can be in the HV distribution (cables, capacitors), indeed all the plateau are good: this can be investigated during the October shutdown.

Sextant 4 wires digi map

L16 M1 T2 P1

Challenges of B Factory Restart

• Jan 21: Re-Start Plan for B Factory submitted for validation review

• Feb 24: Restart Validation Team recommends restart of B Factory complex– BABAR pre-restart conditions:

• Complete labeling of breaker panels required for startup

• Correct items from walkthrough list• Complete VESDA changes for BABAR

• Mar 24: Pre-restart items signed off and authorization to restart given

• Apr 15: First collisions in PEP-II for Run 5– Fast start interrupted by power failure, vacuum leak, and

difficulties passing 7x1033 peak luminosity so far

LST installation summer 2004

Bottom sextant: Aug 15-Sep 4

Top sextant: Sep 16-29

z-strips

LST Modules

Brass

BABAR & Belle physics resultsJournal Papers BABAR Belle

<2003 32 54

2003 39 28

2004 52 35

June 2005 26 23

Total 149 140

Conference Contributions BABAR Belle

Papers submitted to ICHEP04 72 63

Abstracts submitted to LP05 75 73

Papers submitted to LP05 65 ?

Improvement of muon efficiency

MC