SLAC BaBar Program-Overview
Gregory
Blair
Matt
Mark
Rainer
Blair Ratcliff
SLAC BaBar Program Manager
June 2007
DOE Program Review, SLAC,
June 2007
Veronique
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USA
[34/256]
The BABAR Collaboration
OCF Snapshot
California Institute of Technology
UC, Irvine
UC, Los Angeles
U of Tennessee
UC, Riverside
U of Texas at Austin
UC, San Diego
U of Texas at Dallas
UC, Santa Barbara U of Wisconsin
UC, Santa Cruz
Yale
U of Cincinnati
U of Colorado
Colorado State
Canada
[4/23]
Italy
[12/90]
Harvard U
INFN,
Bari
University of British Columbia
INFN, Ferrara
U of Iowa
McGill University
Lab. Nazionali di Frascati dell' INFN
Iowa State U
University de Montréal
INFN, Genova & Univ
Johns Hopkins U
University of Victoria
INFN, Milano & Univ
LBNL
INFN, Napoli & Univ
LLNL
INFN, Padova & Univ
France
[5/40]
U of Louisville
INFN, Pisa & Univ & Scuola
LAPP, Annecy
U of Maryland
Normale Superiore
LAL Orsay
U of Massachusetts, Amherst LPNHE des Universités Paris VI et VII INFN, Perugia & Univ
MIT
INFN, Roma & Univ "La
Ecole Polytechnique, Laboratoire
Sapienza"
U of Mississippi
Leprince-Ringuet
INFN, Torino & Univ
SUNY, Albany
CEA, DAPNIA, CE-Saclay
INFN, Trieste & Univ
U of Notre Dame
Ohio State U
Germany [6/31]
The Netherlands
U of Oregon
Ruhr Universitaet Bochum
Princeton U
Universitaet Dortmund
[1/3]
SLAC
Technische Univeritaet Dresden
NIKHEF, Amsterdam
U of South Carolina
Universitaet Heidelberg
Stanford U
Universitaet Rostock
Norway
[1/4]
Universitaet Karlsruhe
U of Bergen
10 Countries
77 Institutions
522 Physicists
46 Active SLAC Physicists
DOE Program Review, SLAC,
June 2007
Russia
[1/10]
Spain
[2/7]
Budker Institute, Novosibirsk
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
154 Students
89 Postdocs
115 Ph.D. Staff
154 Faculty
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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)
DOE Program Review, SLAC,
June 2007
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SLAC BaBar Manpower Distribution (FTE)
DOE Program Review, SLAC,
June 2007
~constant level of effort (the apparent
computing change reflects
accounting differences from lab
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reorganization).
SLAC Physics Program Support
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Detector Operations & “Service”
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(~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
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Collaboration Management
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Operations and Technical
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Operations Manager
System Leadership & Technical Board
– DCH
– DIRC
– EMC
– IFR/LST
– Trigger
– MDI
Physics and Tools Convenors (6/42-May 07 Snapshot)
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Technical Coordinator
Computing Coordinator
Council Vice Chair
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.
DOE Program Review, SLAC,
June 2007
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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).
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June 2007
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• Improve efficiency of track reconstruction
by allowing additional patterns:
– 3-hit track segments and
– 4 hits in 3 layers of a superlayer.
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DOE Program Review, SLAC,
June 2007
Superlayer
Improving track pattern recognition
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 pT
–
Efficiency and purity improvements by
up to a few percent.
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Physics Program Support-Education
– Typically 10-14
– How many do we
turnover? 16 in last
four years
– Where did they go?
DOE Program Review, SLAC,
June 2007
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10
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Number
• 10 Stanford Ph.D.
Graduate Students
(5/07).
• Research Associates
Next Position for RAs Departing 2003-2007
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4
2
0
Particle Physics
Astro-Particle
Physics
Other Physics
Res.
Industry
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BaBar SLAC Ph.D. Students
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Xsg (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mn (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p0 p0, p+p0, and K+p0
Joshua Thompson, Measurement of Beta in the Dalitz Analysis of B0K+K-Ks
Andrew Wagner, Dalitz Analysis of B0K+p-p0
Brian Lindquist, Asymmetries in Three Body Decays
Manuel Franco Sevilla Rare B Decays
Wells Wulsin, B r(w)ln
Steve Sun, e+e-  V V
Chris West
Jose Benitez
DOE Program Review, SLAC,
June 2007
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SLAC BaBar Physics Analysis
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•
•
•
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:
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–
–
–
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CP Violation in B p0p0 &, more generally, B mm’ where m and m’ are charmless mesons.
Inclusive semi-leptonic B decays and the extraction of |Vub| & |Vcb|
CP Violation and search for new physics in B fKs ; B K+ K-Ks ; B KLKsKs
Search for Exotic Baryons (Pentaquarks)
Search for narrow mesonic resonances (Ds, X(3872), etc.)
Inclusive Hadronic Spectra; p,K,p,f, h, Lc,……………..
Radiative Penguin decays; Inclusive b sg; Inclusive bdg ; B K*g; B rg; B fg; 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 t n(e n)(m n) ; D mn; Ds mn (tn)
Exclusive B decays; B p+p-p, K, K*; B h’K*
CP violation in r+r- B decays
Determination of Hyperon Spins.
See Thumbnails by Matt, Rainer, and Veronique.
DOE Program Review, SLAC,
June 2007
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SLAC BaBar Physics Leadership History
AWG/Tools/Task Force Convenors
•Charmless 2 Body
Cristianziani, Roodman
•Charmless 3 Body
Dujmic, Graham
•Semileptonic
Luth, Dingfelder
•Radiative Penquins
Libby, Jessop, Convery
•Leptonic Decays
Robinson, Schindler
•Pentaquark
Halyo
•Inclusive Spectra
Muller, Ratcliff
•Particle ID
Aston
•Neutral Particles/Reco and ID
Roodman
•Quarkonia
Grenier
DOE Program Review, SLAC,
June 2007
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Future Challenges For SLAC BABAR
• Collaboration Manpower Base is slowly decreasing,
with….
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–
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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.
DOE Program Review, SLAC,
June 2007
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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.
DOE Program Review, SLAC,
June 2007
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