1. DOE Program Review, SLAC, June 2007 1 SLAC BaBar Program-Overview Blair Ratcliff SLAC BaBar Program Manager June 2007 Blair Gregory Matt MarkRainer Veronique

2. DOE Program Review, SLAC, June 2007 2 Russia[1/10] Budker Institute, Novosibirsk Spain[2/7] IFAE-Barcelona IFIC-Valencia United Kingdom [11/58] 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[34/256] 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 Johns Hopkins U LBNL LLNL U of Louisville U of Maryland U of Massachusetts, Amherst MIT U of Mississippi SUNY, Albany U of Notre Dame Ohio State U U of Oregon Princeton U SLAC U of South Carolina Stanford U Canada[4/23] University of British Columbia McGill University University de Montréal University of Victoria France[5/40] LAPP, Annecy LAL Orsay LPNHE des Universités Paris VI et VII Ecole Polytechnique, Laboratoire Leprince-Ringuet CEA, DAPNIA, CE-Saclay Germany[6/31] Ruhr Universitaet Bochum Universitaet Dortmund Technische Univeritaet Dresden Universitaet Heidelberg Universitaet Rostock Universitaet Karlsruhe The BABAR Collaboration OCF Snapshot 10 Countries 77 Institutions 522 Physicists 46 Active SLAC Physicists Italy[12/90] 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 & Scuola Normale Superiore INFN, Perugia & Univ INFN, Roma & Univ "La Sapienza" INFN, Torino & Univ INFN, Trieste & Univ The Netherlands [1/3] NIKHEF, Amsterdam Norway[1/4] U of Bergen U of Tennessee U of Texas at Austin U of Texas at Dallas U of Wisconsin Yale 154 Students 89 Postdocs 115 Ph.D. Staff 154 Faculty

3. DOE Program Review, SLAC, June 2007 3 Core Elements of SLAC BaBar Program Detector: Provide infrastructure, support, engineering and technical support, and management (see Hassan’s talk) Computing: Provide infrastructure, support, and management (Gregory) Physicist Collaborators (SLAC BaBar) –Overview-Structure and Leadership (Blair) –Computing (Gregory) –LST Upgrade Completion (Mark) –Physics Sketches (Matt, Rainer, Veronique)

4. DOE Program Review, SLAC, June 2007 4 SLAC BaBar Manpower Distribution (FTE) ~constant level of effort (the apparent computing change reflects accounting differences from lab reorganization).

5. DOE Program Review, SLAC, June 2007 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 (more later) Leadership –May 2007 –Collaboration Management Technical Coordinator Computing Coordinator Council Vice Chair –Operations and Technical Operations Manager System Leadership & Technical Board –DCH –DIRC –EMC –IFR/LST –Trigger –MDI –Physics and Tools Convenors (6/42-May 07 Snapshot) Quarkonia Hadronic Spectra 3 body Charmless Semileptonic Neutral Particles Reconstruction and ID –Standing and Ad-hoc Committees Exec board; Speakers Bureau; Pub Board; Beyond 2008Task Force; Membership Committee; etc.

6. DOE Program Review, SLAC, June 2007 6 Detector and Computing: Two Upgrade Examples-2007 Detector hardware upgrades have been completed with strong SLAC support. –“Final” Detector hardware upgrade was IFR Barrel (LST Installation) completed 11/2006. (See Mark’s talk) Software upgrades still being explored that improve performance-E.g., Improved pattern recognition for tracking (Ofte).

7. DOE Program Review, SLAC, June 2007 7 Improve efficiency of track reconstruction by allowing additional patterns: –3-hit track segments and –4 hits in 3 layers of a superlayer. Improving track pattern recognition Superlayer ● Reduce background from incorrectly assigned hits by an improved track-finding algorithm. ● Have obtained – 0.5-2 % increase in tracking efficiency, most notably for low p T – Efficiency and purity improvements by up to a few percent.

8. DOE Program Review, SLAC, June 2007 8 Physics Program Support-Education 10 Stanford Ph.D. Graduate Students (5/07). Research Associates –Typically 10-14 –How many do we turnover? 16 in last four years –Where did they go?

9. DOE Program Review, SLAC, June 2007 9 Graduated Students and Thesis Topics Hiro Tanaka, Radiative Decays of the B Meson (8/02). Aron Soha, Branching Fraction and Time-Dependent CP Asymmetry in Neutral B Decays to Psi and a Neutral Pion (5/03). Amanda Weinstein, Study of Exclusive Charmless Semileptonic Decays of the B Meson (12/04). Erkcan Ozcan, Measurement of Inclusive Radiative B Meson Decay B  X s  (1/06) Tetiana Hryn’ova, Study of B Meson Decays to p anti-p h Final States (3/06) Joerg Stelzer, A Precise Measurement of Ds   (4/06). Nicolas Berger, Inclusive Measurement of RHAD with ISR events (4/06). Current Students and Thesis Topics, if known. Kevin Yarritu, Radiative Penguin Decays Mark Allen, Measurement of Alpha in B           and     Joshua Thompson, Measurement of Beta in the Dalitz Analysis of B0  K + K - K s Andrew Wagner, Dalitz Analysis of B0  K +     Brian Lindquist, Asymmetries in Three Body Decays Manuel Franco Sevilla Rare B Decays Wells Wulsin, B   l  Steve Sun, e + e -  V V Chris West Jose Benitez BaBar SLAC Ph.D. Students

10. DOE Program Review, SLAC, June 2007 10 Physics Analysis SLAC BaBar Physics Analysis Fully collaborative physics analysis model….. across institutions and groups. Broad program. Many different “key” results. SLAC is full participant in all phases. E.g., there were 484 BaBar Analysis Notes last year. SLAC physicist was the lead editor on 60. 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. –Exclusive VV production in e+e- collisions. –Leptonic b & c decays; (e.g., B   e  D   D s   –Exclusive B decays; B  p+p-      ’K* –CP violation in  +  - B decays –Determination of Hyperon Spins. See Thumbnails by Matt, Rainer, and Veronique.

11. DOE Program Review, SLAC, June 2007 11 SLAC BaBar Physics Leadership History AWG/Tools/Task Force Convenors Charmless 2 Body Cristianziani, Roodman Charmless 3 Body Dujmic, Graham SemileptonicLuth, Dingfelder Radiative PenquinsLibby, Jessop, Convery Leptonic DecaysRobinson, Schindler PentaquarkHalyo Inclusive SpectraMuller, Ratcliff Particle IDAston Neutral Particles/Reco and IDRoodman QuarkoniaGrenier

12. DOE Program Review, SLAC, June 2007 12 Future Challenges For SLAC BABAR Collaboration Manpower Base is slowly decreasing, with…. –Ever larger data sets for Physics Analyses –Computing Capacity Growing –Luminosity/Background growth. –Increasing pressure on total manpower as LHC draws closer, and experimental data taking ends. –Intensive analysis period following end of data taking.  Flat need for SLAC operational support through end of running FY2008  Substantial needs for computing support during intense analysis phase (FY2009-2011).  (Fy2009-2014?) Fully exploit the unique data set for physics.

13. DOE Program Review, SLAC, June 2007 13 Summary Summary SLAC BaBar: –Provides infrastructure, management, and technical support for detector and computing. –Physics groups partner with the Collaboration on physics analysis, computing & detector operations.