babar: stato e prospettive
DESCRIPTION
Babar: Stato e Prospettive. Giancarlo Piredda INFN Sezione di Roma La Sapienza. PEP-II Safety Planning and Restart. Cronistoria degli eventi (J.Seeman IFC di Luglio). October 11, 2004 Electrical accident at SLAC. All running of accelerators stopped. - PowerPoint PPT PresentationTRANSCRIPT
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]
Last changed:
Please send comments and corrections to D.MacFarlane This page was generated by the BaBar web unwrapping script. Original page was:http://www.slac.stanford.edu/BFROOT/www/Organization/Spokesperson/P5/P5_agenda.htm
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