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
December 10, 2001 Collaboration Meeting 2
We had lots to celebrate in Paris
Great physics results and presentations at the
Outstanding PEPII/BaBar performance
approaching 300 pb-1/day
200 – 250 pb-1/day is common; many “double-
BaBar efficiency is consistently ~ 97-98 %
New spokesperson - Elect
December 10, 2001 Collaboration Meeting 3
Changing of the Guard:
Many thanks! Welcome aboard!
Gautier H. de Monchenault Hassan Jawahery
Hassan Jawahery Livio Lanceri
Dave MacFarlane Pat Burchat
Vivek Sharma Jean-Pierre Lees
Eli Rosenberg Livio Piemontese
Francois Lediberder Christian Borean
Tricia Rankin Klaus Schubert
December 10, 2001 Collaboration Meeting 4
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
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
72 Institutions INFN and U Padova
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
Prairie View A&M U of Bristol
Princeton Brunel University
LPNHE des Universités Paris 6/7
SLAC U of Edinburgh
U of South Carolina U of Liverpool
Stanford U CEA, DAPNIA, CE-Saclay
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
Uof Texas at Austin
December 10, 2001 Collaboration Meeting 7
Building for the Future!
POST DOC/GRAD STUDENT SUMMARY
(BaBar Physicist Members, not including Associates) 02/10/01
Country Grad Students Post-docs
CANADA 4 4
CHINA 0 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.
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
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
Ba0 (,,K) B0 mixing and lifetimes with Semileptonic decays
B3-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 (Ba1)
December 10, 2001 Collaboration Meeting 11
BaBar Physics Results
Submitted for Publication
Preliminary Conference Presentation
Preliminary results to be released Soon
B Decays to Open Charm
BD(*) D(*)K modes
Ratio of Br. For B D K /BD
B Ds(*) D(*) & Inclusive Ds
b s - semi inclusive
limits on B-r/w BDD(*)
B->s – fully inclusive Ratio of Br. For B D* K /BD* (Partially Reco)
Color suppressed modes: D00/w0/
B->D*a1, D*Ds (partially reconstructed)
Semileptonic B Decays Charm Physics
Vub & Vcb measurements Search for Lifetime Difference in D0K-+ 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 Lcpk
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, tm
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
(~12% off peak)
December 10, 2001 Collaboration Meeting 13
Records for Recorded Lumi
Shift: 102 pb-1
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
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
• Minor gain losses and noise
increase, do not impact
• Results predict life of
SVT over original
estimates by factor 2
December 10, 2001 Collaboration Meeting 17
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