1. DOE Program Review, SLAC, June 2005 1 SLAC BaBar Program Blair Ratcliff SLAC BaBar Program Manager June 2005 BlairRainerAaron

2. DOE Program Review, SLAC, June 2005 2 INFN, Perugia & Univ INFN, Roma & Univ "La Sapienza" INFN, Torino & Univ INFN, Trieste & Univ The Netherlands [1/4] NIKHEF, Amsterdam Norway[1/3] U of Bergen Russia[1/13] Budker Institute, Novosibirsk Spain[2/3] IFAE-Barcelona IFIC-Valencia United Kingdom [11/75] U of Birmingham U of Bristol Brunel U U of Edinburgh U of Liverpool Imperial College Queen Mary, U of London U of London, Royal Holloway U of Manchester Rutherford Appleton Laboratory U of Warwick USA[38/311] California Institute of Technology UC, Irvine UC, Los Angeles UC, Riverside UC, San Diego UC, Santa Barbara UC, Santa Cruz U of Cincinnati U of Colorado Colorado State Harvard U U of Iowa Iowa State U LBNL LLNL U of Louisville U of Maryland U of Massachusetts, Amherst MIT U of Mississippi Mount Holyoke College SUNY, Albany U of Notre Dame Ohio State U U of Oregon U of Pennsylvania Prairie View A&M U Princeton U SLAC U of South Carolina Stanford U U of Tennessee U of Texas at Austin U of Texas at Dallas Vanderbilt U of Wisconsin Yale Canada[4/24] U of British Columbia McGill U U de Montréal U of Victoria China[1/5] Inst. of High Energy Physics, Beijing France[5/53] LAPP, Annecy LAL Orsay The BABAR Collaboration 11 Countries 80 Institutions 623 Physicists 49 Active SLAC Physicists LPNHE des Universités Paris VI et VII Ecole Polytechnique, Laboratoire Leprince-Ringuet CEA, DAPNIA, CE-Saclay Germany[5/24] Ruhr U Bochum U Dortmund Technische U Dresden U Heidelberg U Rostock Italy[12/99] INFN, Bari INFN, Ferrara Lab. Nazionali di Frascati dell' INFN INFN, Genova & Univ INFN, Milano & Univ INFN, Napoli & Univ INFN, Padova & Univ INFN, Pisa & Univ & ScuolaNormaleSuperiore

3. DOE Program Review, SLAC, June 2005 3 Core Elements of BaBar Program Computing: Provide infrastructure, support, and management (Rainer) Detector: Provide infrastructure, support, engineering and technical support, and management (David) Physicist Collaborators (SLAC BaBar) –Computing (Rainer) –Structure and Leadership (Blair) –Detector Upgrades (Blair) –Physics Analysis (Aaron)

4. DOE Program Review, SLAC, June 2005 4 BaBar Manpower Distribution (%) BaBar Manpower Distribution (%)

5. DOE Program Review, SLAC, June 2005 5 SLAC Physics Program Support Detector Operations & “Service” –(~0.6 of Active Physicist FTEs, ~2x nominal collaboration average) –Significant role in most detector systems, MDI, computing, etc. Detector and Computing Upgrades Physics Analysis Leadership –Collaboration Management Technical Coordinator Computing Coordinator Deputy Computing Coordinator –Operations and Technical Operations Manager System Leadership & Technical Board –DCH –DIRC –Trigger –Physics and Tools Convenors (7/41 (March Snapshot)) Pentaquark Task Force Hadronic Spectra Radiative Penguin 3 body Charmless Two Body Charmless PID –Standing and Ad-hoc Committees Exec board; Speakers Bureau; Pub Board; CM2 Oversight; Roadmap Committee; Membership Committee; etc.. Detector R&D

6. DOE Program Review, SLAC, June 2005 6 Physics Program Support-Education 10 Stanford Ph.D. Graduate Students. Research Associates –Typically 10-14 –How many do we turnover? 11 in last two years –Where are they now?

7. DOE Program Review, SLAC, June 2005 7 Future Challenges-as Lumi Grows Collaboration Manpower Base is ~static now, but…. –Ever larger data sets for Physics Analyses –Necessary Computing Capacity Growth –Luminosity/Background growth. –Pressure on total manpower as LHC draws closer, and experimental data taking ends.  At least flat (increasing?) need for SLAC operational support. Detector Upgrades to cope with increasing backgrounds at high lumi –Trigger –DCH Electronics –IFR Barrel

8. DOE Program Review, SLAC, June 2005 8 L1 Trigger Upgrade (DCZ) Institutions: Bristol, Harvard, Iowa, Manchester, Oregon, RAL, SLAC  8 new ZPDs ( Z-Pt-Discriminators ) for 3D tracking  24 new TSFs ( Track Segment Finders )  Interface cards ( at back of rack ): 24 TSFi, 8 ZPDi and 1 GLTi TSF ZPD BLT Entire Drift-Chamber Trigger system replaced (except 1 BLT) to gain 3D tracking capability using stereo wires. Full system physics run test July/04. Driving BaBar L1 since start of Run 5

9. DOE Program Review, SLAC, June 2005 9 Running since July 29, 2004. DCZ does its job just as well as we hoped –Finding tracks and measuring z 0 and p T How is this information used? –ZPD can count tracks with cuts on |z 0 | and |1/p T | –GLT can combine “Z tracks” with other trigger objects It’s a balancing act –Physics efficiency (which physics?) and robustness –Maximum reduction of L1 trigger rate Bottom Line on L1 Trigger Rate

10. DOE Program Review, SLAC, June 2005 10 L1 Trigger Upgrade (DCZ) A conservative start with loose cuts to ensure physics efficiency well preserved. Reduced L1 rate by 18% ( excluding the test 1Z addition ) Configuration study in progress for significantly larger background reductions (e.g. require 1 -ve track OR 1 high Pt +ve track with |Z0|<cut, which were not available with the old DCT system) Will be essential when luminosity significantly exceeds 10 34

11. DOE Program Review, SLAC, June 2005 11 DCH Electronics Upgrade What was the problem ? DCH waveform data shipping from front-end causes dead time (very non-linear!) In 2003 the problem was anticipated to become serious soon due to increasing luminosity and trigger rates SLAC involvement: Problem identification, solution recommendation, board redesign, QC. SLAC manpower: 5 physicists, 2 engineers, students Collaborating Inst: SLAC ISU, Notre Dame

12. DOE Program Review, SLAC, June 2005 12 Paths to solve it Phase I reduce sampling of raw waveform (32  16 bytes) Firmware change (PROM) on front-end board Fully implemented in Summer 2004 shutdown (2 weeks) Data quality is not compromised Phase II Run feature extraction in front-end, data reduction of factor 4 Board redesign including modified FPGA TDR in Dec ‘04; final design ready; full implementation during Oct ’05 shutdown Test boards have been put on chamber since Jan ‘05 to evaluate performance. SEU from neutrons might become a problem (20 functional upsets per day in 2007) and maybe need attention starting Nov ‘05 (Phase III)

13. DOE Program Review, SLAC, June 2005 13 IFR Upgrade (Barrel RPCs to LSTs) Jan. ’03: Deteriorating performance of Barrel IFR RPC’s leads to decision to replace with LST’s Oct. ‘04: First 2 sextants installed. 8/06-11/06: Final 4 sextants installed. Delayed from summer 05 by change in PEP schedule.

14. DOE Program Review, SLAC, June 2005 14 Barrel  6 Brass layers  RPC  LST  2 sectors in 2004  4 more in 2006 Barrel IFR Upgrade New layer New RPC belt 10cm steel 5 layers of 2.5 cm brass

15. DOE Program Review, SLAC, June 2005 15 Broad Participation across collaboration IFR Barrel Upgrade Responsibilities INFN: Ferrara, Frascati, Genova, Padova, Roma, Torino US: LLNL, Ohio State, Oregon, Princeton, SLAC, UCSD LST Tube Production and Factory QA; Front End Electronics; Installation Readout Planes; Module Assembly; Module QC; HV System; Cabling; Gas System; Installation

16. DOE Program Review, SLAC, June 2005 16 Readout Plane Production Manufactured at SLAC using “Large scale lamination.” Only Z-planes provide a position. Phi planes serve as the ground plane and transmit wire signals to forward end. Manufactured at SLAC using “Large scale lamination” Production of all planes completed by Fall 2004.

17. DOE Program Review, SLAC, June 2005 17 CEH QC Area QC being done at CEH First 2 sextants had 0 bad wires out of ~2000 QC continuing on modules for ‘06. Last shipment expected this week Simultaneously testing HV cables and supplies

18. DOE Program Review, SLAC, June 2005 18 LST Installation New east platform for electronics Special tooling for backward corner block Peter Kim & Charlie Young

19. DOE Program Review, SLAC, June 2005 19 Backward side Bottom sextant before and after installation

20. DOE Program Review, SLAC, June 2005 20 Typical Plateaus All good Operated at 5500V

21. DOE Program Review, SLAC, June 2005 21Efficiency

22. DOE Program Review, SLAC, June 2005 22 Muon Pair in LST Equipped Sectors

23. DOE Program Review, SLAC, June 2005 23 Physics Analysis Fully collaborative physics analysis model….. across institutions and groups. Broad program. Many different “key” results. Some examples of SLAC BaBar’s interests: –CP Violation in B   0  0 &, more generally, B  mm’ where m and m’ are charmless mesons. –Inclusive semi-leptonic B decays and the extraction of |V ub | & |V cb | –CP Violation and search for new physics in B   K s ; B  K + K - K s ; B  K L K s K s –Search for Exotic Baryons (Pentaquarks) –Search for narrow mesonic resonances (D s, X(3872), etc.) –Inclusive Hadronic Spectra;  K,p, ,  c,…………….. –Radiative Penguin decays; Inclusive b  s  Inclusive b  d    K*  ; B   ; B   ; etc. –ISR; Exclusive hadronic final states; Inclusive and exclusive measurements of R. –Leptonic b & c decays; (e.g., B   e  D   D s   –Exclusive B decays; B  p+p-      ’K* See Aaron’s talk!

24. DOE Program Review, SLAC, June 2005 24 Summary Summary SLAC BaBar: –Provides infrastructure, management, and technical support for detector and computing. –Physics groups partner with the Collaboration on analysis, & operations. –Aaron  Physics –Rainer  Computing