SLAC BaBar Program-Overview

DOE Program Review, SLAC, June 2007

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SLAC BaBar Program-OverviewSLAC BaBar Program-Overview

Blair Ratcliff

SLAC BaBar Program Manager

June 2007

Blair Gregory

Matt

Mark Rainer

Veronique


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Russia [1/10]Budker Institute, Novosibirsk

Spain [2/7]IFAE-BarcelonaIFIC-Valencia

United Kingdom [11/58]U of BirminghamU of BristolBrunel UU of EdinburghU of LiverpoolImperial CollegeQueen Mary , U of LondonU of London, Royal Holloway U of ManchesterRutherford Appleton LaboratoryU of Warwick

USA[34/256]

California Institute of Technology

UC, IrvineUC, Los AngelesUC, RiversideUC, San DiegoUC, Santa BarbaraUC, Santa CruzU of CincinnatiU of ColoradoColorado StateHarvard UU of IowaIowa State UJohns Hopkins ULBNLLLNLU of LouisvilleU of MarylandU of Massachusetts, AmherstMITU of MississippiSUNY, AlbanyU of Notre DameOhio State UU of OregonPrinceton USLACU of South CarolinaStanford U

Canada [4/23]University of British ColumbiaMcGill UniversityUniversity de MontréalUniversity of Victoria

France [5/40]LAPP, AnnecyLAL OrsayLPNHE des Universités Paris VI et VIIEcole Polytechnique, Laboratoire

Leprince-RinguetCEA, DAPNIA, CE-Saclay

Germany [6/31]Ruhr Universitaet BochumUniversitaet DortmundTechnische Univeritaet DresdenUniversitaet HeidelbergUniversitaet RostockUniversitaet Karlsruhe

The BABAR Collaboration OCF

Snapshot10 Countries

77 Institutions522 Physicists

46 Active SLAC PhysicistsItaly[12/90]

INFN, BariINFN, FerraraLab. Nazionali di Frascati dell'

INFNINFN, Genova & UnivINFN, Milano & UnivINFN, Napoli & UnivINFN, Padova & UnivINFN, Pisa & Univ & Scuola

Normale SuperioreINFN, Perugia & UnivINFN, Roma & Univ "La

Sapienza"INFN, Torino & UnivINFN, Trieste & Univ

The Netherlands [1/3]

NIKHEF, Amsterdam

Norway [1/4]U of Bergen

U of TennesseeU of Texas at AustinU of Texas at DallasU of WisconsinYale

154 Students89 Postdocs

115 Ph.D. Staff

154 Faculty


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Core Elements of SLAC BaBar ProgramCore 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)


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SLAC BaBar Manpower Distribution (FTE)SLAC BaBar Manpower Distribution (FTE)

~constant level of effort (the apparent computing change reflects accounting differences from lab reorganization).


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SLAC Physics Program SupportSLAC 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.


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Detector and Computing: Two Upgrade Examples-2007Detector 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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• 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

Sup

erla

yer

● 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.


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Physics Program Support-EducationPhysics 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?

Next Position for RAs Departing 2003-2007

0

2

4

6

8

10

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Particle Physics Astro-ParticlePhysics

Other PhysicsRes.

Industry

Nu

mb

er


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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 BXs (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 Band

Joshua Thompson, Measurement of Beta in the Dalitz Analysis of B0K+K-Ks

Andrew Wagner, Dalitz Analysis of B0K+

Brian Lindquist, Asymmetries in Three Body Decays Manuel Franco Sevilla Rare B Decays Wells Wulsin, B lSteve Sun, e+e- V V Chris West Jose Benitez

BaBar SLAC Ph.D. StudentsBaBar SLAC Ph.D. Students


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SLAC BaBar Physics AnalysisPhysics 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 00 &, 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 Ks ; B K+ K-Ks ; B KLKsKs

– Search for Exotic Baryons (Pentaquarks)– Search for narrow mesonic resonances (Ds, X(3872), etc.)– Inclusive Hadronic Spectra; K,p,,c,……………..– Radiative Penguin decays; Inclusive b sInclusive bdK*; 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 Ds – Exclusive B decays; B p+p-’K*– CP violation in +- B decays– Determination of Hyperon Spins.

• See Thumbnails by Matt, Rainer, and Veronique.


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SLAC BaBar Physics Leadership HistoryAWG/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


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Future Challenges For SLAC BABARFuture 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 FY2008Substantial needs for computing support during

intense analysis phase (FY2009-2011).(Fy2009-2014?) Fully exploit the unique data set for

physics.


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SummarySummary

• SLAC BaBar:– Provides infrastructure, management, and

technical support for detector and computing.– Physics groups partner with the Collaboration

on physics analysis, computing & detector operations.

SLAC BaBar Program-Overview

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