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Stewart Smith
Collaboration Meeting
 December 10, 2001
It’s so good to see everyone again

    It’s been almost 6 months – much too long!
    Many thanks to our Paris colleagues for all their work
     toward the ill-fated September meeting.
    Support from European colleagues meant a lot to
     those of us here.
    We’ve already had a great week of workshops to
     make up for the gap.
    Bldg 280 is back to normal --no place to sit down.
    All this enthusiasm makes me realize how privileged
     we are!

 December 10, 2001       Collaboration Meeting                2
We had lots to celebrate in Paris

       Great physics results and presentations at the
        summer conferences

       Outstanding PEPII/BaBar performance
             approaching 300 pb-1/day
             200 – 250 pb-1/day is common; many “double-
              design” days
             BaBar efficiency is consistently ~ 97-98 %

       New spokesperson - Elect

December 10, 2001            Collaboration Meeting          3
               Changing of the Guard:
            Many thanks! Welcome aboard!

     Physics Analysis:
           Gautier H. de Monchenault                        Hassan Jawahery
                        Hassan Jawahery                         Livio Lanceri
     Publications Board:
           Dave MacFarlane                                  Pat Burchat
     Speakers Bureau:
           Vivek Sharma                                     Jean-Pierre Lees
     Run Coordinators:
           Eli Rosenberg                                    Livio Piemontese
           Francois Lediberder                                 Christian Borean
                    Steve Sekula
     Collaboration Council:
            Tricia Rankin                                   Klaus Schubert

    December 10, 2001                Collaboration Meeting                        4
     Collaboration Governance

     New Spokesperson – Elect!
          Marcello Giorgi of Pisa will take office mid-Sept 2002

      Senior Management Team:
          Spokesperson                     Stew Smith
          Spokesperson-Elect               Marcello Giorgi
          Technical Coordinator            Yannis Karyotakis
          Analysis Coordinator             Hassan Jawahery
            • Deputy                                 Livio Lanceri
          Computing Coordinator             Jim Smith
            • Deputy                                 Stephen Gowdy
          Senior Technical Advisor          Bill Wisniewski
          Administrative Assoc.             Barbara Barrera

December 10, 2001            Collaboration Meeting                   5
Welcome to the Kitchen, Marcello!

 December 10, 2001   Collaboration Meeting   6
USA [36/280
California Institute of Technology                                           Italy              [12/89]
UC, Irvine                              The BABAR                            INFN and U Bari
UC, Los Angeles
UC, San Diego
UC, Santa Barbara
                                        Collaboration                        INFN and U Ferrara
                                                                             Lab. Nazionali di Frascati dell' INFN
UC, Santa Cruz                                                               INFN and U Genova
U of Cincinnati                                     9 Countries              INFN and U Milano
U of Colorado                                                                INFN and U Napoli
Colorado State
                                                    72 Institutions          INFN and U Padova
Florida A&M
                                                    554 Physicists           INFN and U Pavia
                                                                             INFN, SNS and U Pisa
U of Iowa                                                                    INFN, Roma and U "La Sapienza"
Iowa State U                                                                 INFN and U Torino
LBNL                                 Canada             [4/16]               INFN and U Trieste
                                     U of British Columbia
U of Louisville
U of Maryland                        McGill U                                Norway             [1/3]
U of Massachusetts, Amherst          U de Montréal                           U of Bergen
MIT                                  U of Victoria
U of Mississippi                                                             Russia             [1/13]
Mount Holyoke College
                                                                             Budker Institute, Novosibirsk
Northern Kentucky U                  China              [1/6]
U of Notre Dame                      Inst. of High Energy Physics, Beijing
U of Oregon                          France             [5/50]               United Kingdom [10/80]
U of Pennsylvania                                                            U of Birmingham
                                     LAPP, Annecy
Prairie View A&M                                                             U of Bristol
                                     LAL Orsay
Princeton                                                                    Brunel University
                                     LPNHE des Universités Paris 6/7
SLAC                                                                         U of Edinburgh
                                     Ecole Polytechnique
U of South Carolina                                                          U of Liverpool
Stanford U                           CEA, DAPNIA, CE-Saclay
                                                                             Imperial College
U of Tennessee                                                               Queen Mary & Westfield College
U of Texas at Dallas                 Germany            [3/21]               Royal Holloway, University of London
                                     U Rostock                               U of Manchester
U of Wisconsin
                                     Ruhr U Bochum                           Rutherford Appleton Laboratory
                                     Technische U Dresden
           SUNY Albany
           Uof Texas at Austin

   December 10, 2001                                 Collaboration Meeting                                           7
               Building for the Future!
               (BaBar Physicist Members, not including Associates)               02/10/01

               Country                     Grad Students             Post-docs

               CANADA                                            4                     4
               CHINA                                             0                     0
                                                                                  *    2
                                                                                  *   12
                                                                                  *    0
               USA                                              56                    59

               Totals                                         131                     99
 * Underestimated -- people obtain permanent positions very early
December 10, 2001                       Collaboration Meeting                               8
            Moving Days Begin Jan 14

   BaBarians will be concentrated in new Research Office
    Building and Bldg 280.
   New building is approaching completion.
   First allocation of offices has been completed
        We beg for your cooperation and understanding
        Adjustments will be made based on actual usage during next few
   Moves will take place before next Collaboration meeting,
    so you must pack your possessions before leaving, unless
    you’ll be here the last 2 weeks of January.
        Boxes will be available later this week. Announcements to follow.

    December 10, 2001           Collaboration Meeting                  9
         A critical meeting for BaBar
   Numerous operations issues
        longest run in our history
         enormous amount of data
   Flood of analyses about to produce new results for
    the winter circuit.
        Keep to our standards of quality and timeliness.
        We have very tough competition.
   Budget stress.
        BaBar is a great success story at a time when our field badly
         needs one, so we continue to receive strong support in these
         times of fiscal peril
        Other needs around the world are putting huge pressure on
         dwindling budgets, so we must be as lean as possible.
   Time to seriously address the post-500 fb-1 era.

December 10, 2001            Collaboration Meeting                 10
                         BaBar Physics Results                                   19 papers
                          Journal publication
                          Submitted for Publication                             out the door!
                          Preliminary Conference Presentation
                          Preliminary results to be released Soon

                     CP Violation Studies                                   Charmonium Studies
CP-violation in B Decays to charmonium states (sin2)                   J/ production in the continuum
Direct CP violation in 2-body charmless Decays (+K-, +0, +Ks)       J/ K* angular analysis
CP violation in the decay B+ - (sin2a-eff)                           Exclusive branching fractions
Direct CP violation in B Decays to charmonium states                    J/ K versus J/ 
Direct CP violation in quasi 2-body charmless Decays                    (2s)e+e-/ )2s)m+m-
CP violation in mixing with Dileptons                                   Inclusive branching fractions
CP violation in B Decays to Double-Charm states (sin2)                 Direct CP-violation in J/ K+

         Charmless B Decays                                          B Lifetimes and Mixing
Branching Ratios for 2-body charmless decays:
 +-, +K-, K+K-, 0, Ks, 0Ks, KsKs, (0 0)    B0 and B+ Lifetimes with fully Reconstructed
B-> (with K, Ks or K* ,)                           hadronic B decays
B( , w) (, K)                                   B0 Mixing with Dilepton Events
Inclusive B-> Xs                                  B0 mixing with fully reconstructed hadronic B decays
 Ba0 (,,K)                                        B0 mixing and lifetimes with Semileptonic decays
B3-body(, r, K*)                              B lifetimes with Dilepton Events
B(r, w) (K*, r, w, ’)                             B Lifetimes with partially reconstructed B decays
B(,’)(K*)                                        B0 mixing with partially reconstructed B decays
 4-prong modes (Ba1)

     December 10, 2001                     Collaboration Meeting                                  11
                                   BaBar Physics Results
                                  Journal publication
                                  Submitted for Publication
                                  Preliminary Conference Presentation
                                  Preliminary results to be released Soon
                                                                    B Decays to Open Charm
              Radiative Penguins
                                                         BD(*)D(*)
                                                         BD(*) D(*)K modes
   B  K* 
                                                         Ratio of Br. For B D K /BD
   B  K(*)ll
                                                         B Ds(*) D(*) & Inclusive Ds
   b  s  - semi inclusive
   limits on B-r/w                                   BDD(*)
   B->s  – fully inclusive                            Ratio of Br. For B D* K /BD* (Partially Reco)
                                                        Color suppressed modes: D00/w0/
                                                        B->D*a1, D*Ds (partially reconstructed)

           Semileptonic B Decays                                             Charm Physics
          Vub & Vcb measurements                      Search for Lifetime Difference in D0K-+ vs D0 K+K-
 Ratio of B0 & B+ SL Branching Fractions             Wrong sign fraction in D0 Decays
 Semi-leptonic B Branching Fractions                 Limits on D0 mixing
 Branching Fractions for B (r/w/) ln ( |Vub |)    Dalitz analyses (Ds and D0 Decays)
 |Vub| from Lepton Spectrum                          Branching fraction For Lcpk
 Exclusive D(*)ln (|Vcb |)                          D-mixing with SL
                                                      Branching fraction for charm Decays with ISR events
 Leptonic B Decays                   Inclusive Hadron Spectra
        B  mm, ee,                                                             tm
        B  tn, tn()                                                           CP violation in t decays
        December 10, 2001                      Collaboration Meeting             c                  12
                2000 – 2002 Operations

    24 fb-1 in 2000
    40 fb-1 in 2001                                  Total (00-01)
    36 fb-1 by June 30 ’02                              (64)
    4-month shutdown                                    (6.5)

     100 fb-1 by
     June 30
(~12% off peak)


 December 10, 2001            Collaboration Meeting                   13
      PEPII/BaBar Performance
 Records for Recorded Lumi
         Shift:      102 pb-1
         Day:        278
        Week:       1758
        Month:      6030

                      2 x Design
 Daily recorded lumi

December 10, 2001               Collaboration Meeting          14
   Just able to keep up with data.
   Most expensive improvement from now to 2007.
   Main reason: Luminosity increasing faster than Moore’s Law
   Storage cost is the largest item
   Multiple “Tier A” sites (IN2P3 in 2001, INFN, UK in 2002) to
    share load, and evolve toward a GRID-like configuration
       IN2P3 has already relieved a significant load from SLAC
   Model is evolving, will be reviewed this spring
   OPR and Reprocessing:
       > 500 pb-1/day regularly when doing normal runs
       Hardware problem with linux machines delaying changeover

    December 10, 2001           Collaboration Meeting              15
Detector Prognosis

   With due care and feeding,
    most detector systems will work
    up to ~2 x 1034 and should last for several years.
   Drift CHamber; DIRC; and E M Calorimeter
        radiation aging tests show they should last
        Significant modifications in electronics likely to be needed
   Silicon Vertex Tracker (SVT)
        Spare modules funded and under construction
        Radiation damage tests indicate lifetime >4Mrad (twice design)
   Instrumented Flux Return (IFR)
        Muon ID will be improved by adding material
            Upgrade forward endcap in 2002
        Concerns because of decreasing RPC efficiency
            Big problem for barrel if not remediated. Will address it in 2004

December 10, 2001                Collaboration Meeting                           16
Silicon Vertex Tracker aging tests

     Chips have been
 irradiated at SLAC and
    LBL up to 4Mrad

                                        • Both chips and silicon still
                                          perform well.
                                        • Minor gain losses and noise
                                          increase, do not impact
                                          physics performance
                                        • Results predict life of
                                          SVT over original
                                          estimates by factor 2
 December 10, 2001        Collaboration Meeting                          17
                 Long-term schedule
    PEP-II Luminosity should steadily increase to ~ 2  1034
     by ~2006, without long disruptive shutdowns.
    Improved prognosis for SVT suggests an attractive
     scenario: replace SVT modules on beam plane in 2004,
     after which it should last till ~2007.
         We can fabricate more modules to replace the ones in the beam
          plane again if needed.
    Can rest of detector adapt to only one major intervention
     ( 4 months) before 2007?
         DIRC, EMC appear to be OK.
         IFR Barrel is a serious question, but it has to be resolved by 2004.
         DCH – aging tests say it should last.

    December 10, 2001            Collaboration Meeting                   18
                        2007 and Beyond

   It appears feasible to accumulate  Ldt 1,000 fb-1
    by 2010 with PEPII and BaBar
   Program must be driven by physics – Direct CP and rare
    decays will remain very promising directions.
   To be ready to pursue hints of new physics, we need to
    understand higher-L possibilities (10 35,1036 )
   Must have competitive capabilities to LHCb and BTeV
   White paper submitted to Snowmass
   Round–Table discussion tomorrow afternoon
       John Seeman, Yannis Karyotakis, Rafe Schindler, Marcello Giorgi,
        and David Hitlin will present their views
       Followed by 40 minutes of comments, and then by our reception

    December 10, 2001          Collaboration Meeting                 19

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