Overview of the SLAC HEP Program

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Overview of the SLAC HEP Program

• Persis S. Drell
• Research Director
• SLAC

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(No Transcript)
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The SLAC Program
X-ray Experiments in FTTB
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B-Factory Program
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B-factory Program

• PEP-II Accelerator
• Collides e and e- with unequal beam energies at
  ECM10.58 GeV
• Premier tool for studying physics of heavy flavor
• BaBar Detector
• Optimized for B-physics at asymmetric energy
  collider
• Run by International Collaboration of gt 500
  physicists from 74 institutions in 9 countries
• Strong laboratory support for premier program
• Strong International Collaboration Leadership
• Spokesman Marcello Giorgi (Pisa/INFN)
• Analysis Coordinator Livio Lanceri (Trieste)
• Technical Coordinator Bill Wisniewski (SLAC)
• Computing Coordinator Stephen Gowdy (SLAC)

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USA 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 Florida
AM Harvard U of Iowa Iowa State U LBNL LLNL U of
Louisville U of Maryland U of Massachusetts,
Amherst MIT U of Mississippi Mount Holyoke
College SUNY, Albany U of Notre Dame Ohio State
U U of Oregon U of Pennsylvania Prairie View AM
U Princeton U SLAC U of South Carolina Stanford
U U of Tennessee U of Texas at Albany U of Texas
at Dallas Vanderbilt U of Wisconsin Yale
Italy INFN, Bari INFN, Ferrara Lab. Nazionali
di Frascati dell' INFN INFN, Genova INFN,
Milano INFN, Napoli INFN, Padova INFN, Pisa INFN,
Roma and U "La Sapienza" INFN, Torino INFN,
Trieste Norway U of Bergen Russia Budker
Institute, Novosibirsk United Kingdom 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
The BABAR Collaboration 9 Countries
74 Institutions 566 Physicists
Canada U of British Columbia McGill U U de
Montréal U of Victoria China Inst. of High
Energy Physics, Beijing France LAPP, Annecy LAL
Orsay LPNHE des Universités Paris VI et VII Ecole
Polytechnique, Laboratoire Leprince-Ringuet CEA,
DAPNIA, CE-Saclay Germany Ruhr U
Bochum Technische U Dresden U Rostock
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Building for the Future
Country Grad Students Post Docs BaBar PhDs
CANADA 6 3 0
CHINA 0 0 0
FRANCE 13 2 5
GERMANY 15 6 6
ITALY 25 13 4
NORWAY 1 0 0
RUSSIA 0 0 0
UK 27 20 14
USA 62 73 7
Totals 149 117 36
12/02
BaBar Physicist Members, Not Including Associates Underestimated people obtain permanent positions very early
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B-Factory Past Year

• 100 fb-1 (Run 2) followed by long (4.5 mo) down
• Shutdown work
• PEP-II
• Enable increased currents and smaller b
• BaBar
• TDC Upgrade for DIRC (French effort)
• SVT Work (Italy US)
• IFR Endcap upgrade (Italy US)
• Replace dying RPCs with efficient chambers which
  have been carefully Q/Cd
• Drift Chamber damage and repair
• Damaged during support tube extraction
• Full remediation within shutdown schedule

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B-Factory Past Year

• Turn-on November 15.
• Power spikes in December caused hardware damage
  and run delays.
• Running has now stabilized.
• Recent PEP-II Records
• Peak luminosity 5.21 x 1033 cm-2s-1
• Int. luminosity per 3 shifts 347 pb-1
• Total Luminosity Delivered 121 fb -1

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Analysis Improvements

• Steady improvements
• Better statistics
• Better understanding of detector
• In 2 years, CP measurement has moved from a test
  of our understanding to defining our
  understanding
• Many ever more stringent tests yet to come
• CP violation in more complex decays
• Rare B decays
• Rich source of physics at least until the end of
  the decade

sin2b 0.741 ? 0.067 (stat) ? 0.034 (syst)
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B-Factory Plans for Future

• Machine Luminosity Improvements
• Peak luminosity 7 x 1033 cm-2s-1
• Integrated luminosity 150/fb
• Peak luminosity 2 x 1034 cm-2s-1
• Integrated luminosity 500/fb
• Working on a path to
• Peak luminosity 4 x 1034 cm-2s-1
• Integrated luminosity 1-2/ab
• Detector Upgrades
• Begin replacing of Barrel IFR 2004
• Implement New Computing Model

6/03
2006
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Delivering on Promises
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The Competition
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Fixed Target Program
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SLAC 158
Parity-Violating Left-Right Asymmetry In Fixed
Target Moller Scattering
E158 Collaboration

• UC Berkeley
• Caltech
• Jefferson Lab
• Princeton
• Saclay

• SLAC
• Smith College
• Syracuse
• UMass
• Virginia

7 Ph.D. Students
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SLAC E158 Past Year

• Beam Delivery
• Run 1 23 April 27 May 2002
• Run 2 10 October 13 November 2002
• Run 3 7 July 31 August 2003
• Run I result announced 4/3/03
• Parity is violated in Møller scattering
• Limits on extra Zs at the level of 400-500 GeV
• Limit on lepton-flavor violating coupling 0.02
  GF
• Final results in 2004

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E158 Preliminary Results
APV-151.9 ? 29.0 ? 32.5 ppb
sin2?eff(Q20.025 GeV2) 0.2371 0.0025 0.0027
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Future of Fixed Target Program

• Real Photon Experiments
• Indefinitely delayed
• Future Fixed Targe Experiments in the Endstation?
• Depends on
• Physics Case
• Resources

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Linear Collider Program
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Linear Collider

• Exploration of the TeV scale will begin, but not
  end with the CERN LHC
• World-wide consensus (US, Europe, Asia)
• A high energy, high luminosity ee- linear
  collider is the highest priority new project for
  the field.
• LC is the highest priority of the US HEP program
  wherever it is built in the world.
• US should bid to host this facility.
• It will not be built on the SLAC site
• SLAC has had ongoing program in machine (NLC) RD
• We are also working to grow a program of LC
  detector RD

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Linear Collider Detector Effort

• Current focus on
• Ongoing simulations
• Currently looking at SD Silicon Tracker concept
  for the LC detector
• Under study here and elsewhere
• One of several approaches under consideration by
  the community
• Working to build effort at SLAC and provide
  opportunities for user community to engage

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The SLAC Program
X-ray Experiments in FTTB
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Particle Astrophysics and Cosmology
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GLAST g-ray Large Area Space Telescope

• GLAST measures direction, energy and time of
  celestial gamma rays from 20MeV 300 GeV
• Collaboration of Particle Physicists and
  Astrophysicists from France, Italy, Sweden, Japan
  and US
• Collaboration of Space and HEP funding agencies
  from France, Italy, Japan and US
• GLAST will survey the entire sky each day
• Active Galactic Nuclei
• Endpoints of Stellar Evolution Black Holes and
  Neutron Stars
• Dark matter
• Gamma Ray Bursts
• Discovery!

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GLAST/LAT Instrument
Si Tracker pitch 228 µm 8.8 105 channels 12
layers 2.8 X0 4 layers 18 X0 2 layers
Grid ( Thermal Radiators)
3000 kg, 650 W (allocation) 1.8 m ? 1.8 m ? 1.0
m 20 MeV 300 GeV
CsI Calorimeter Hodoscopic array 8.4 X0 8
12 bars 2.0 2.7 33.6 cm
Flight Hardware Spares 16 Tracker Flight
Modules 2 spares 16 Calorimeter Modules 2
spares 1 Flight Anticoincidence Detector Data
Acquisition Electronics Flight Software

• cosmic-ray rejection
• shower leakage
• correction

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GLAST

• Progress in Past Year
• Baseline CD-2/PDR in August 2002
• Good Technical Progress in all Sub-systems
• Project in transition from design to flight
  hardware fabrication
• Plans for Next Year
• CDR/CD-3 in May 2003
• Flight Hardware Fabrication
• Beginning of IT at SLAC
• On schedule for launch September 2006

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Other Particle Astrophysics

• Weekly particle astrophysics seminar series
• Continued analysis of USA data
• Studies of regions of strong gravity
• RD for new initiatives
• Ongoing projects using archival and guest
  observer data
• Experiments in FFTB and ESA
• FLASH (Next year)
• Lab Astro
• 2003 SLAC Summer Institute

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FLASH (E165)

• Uses the high energy electron beam to make
  measurements of the fluorescence yield from
  extensive air showers

• Goal 10 or better in energy of cosmic ray

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Kavli Institute

• Institute building on SLAC site
• Director reports to Stanford Dean of Research
• Operates as independent research center
• 9 new faculty
• Most (if not all) will be joint SLAC/Campus
• Director and Deputy Director recruited!
• Roger Blandford (CalTech)
• Steve Kahn (Columbia)
• Discussions beginning on the scientific
  directions that the institute will take
• It is anticipated the institute will bring in
  funds from NASA and NSF that will flow through
  campus in addition to DOE funds that will flow
  through SLAC

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KIPAC
View from the entrance gate
View from the central lab
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Advanced Accelerator RD
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Advanced Accelerator RD

• Developing the tools that will define the future
  of accelerator based science.
• SLAC has a strong user driven program studying
  physics of new acceleration mechanisms.
• Laser-driven acceleration
• Plasma wake field acceleration
• Two beam acceleration
• Emphasis on proof of principle experiments
• Recent RD progress in breakout sessions

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Plasmas Have Extraordinary Potential
A 100 GeV-on-100 GeV e-e ColliderBased on
Plasma Afterburners
3 km
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ORION
FFTB 30 GeV e- e beams. New potential of e-
beams with sz lt 100 mm
ORION Facility (to be constructed in part with
funds from the ORION Center Proposal) based on
the NLCTA - 65 350 MeV e- beams
The initial use of the FFTB and subsequently
ORION facilities will allow a range of
experiments impossible elsewhere.
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RD for Future Experiments
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EXO Enriched Xenon Observatory

• Search for bb0 decay in reaction 136Xe --gt136Ba
  e-e
• Observation of decay would provide direct
  evidence on
• Lepton number violation
• Neutrinos are Majorana fermions
• Set neutrino mass scale
• EXO technique in RD phase
• Will hear about RD progress and future plans
  (Rowson)
• Successful RD would lead to full scale proposal
  for EXO facility

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Theory Program
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SLAC Theory Group

• Primary mission to advance theoretical
  high-energy physics, and to train young
  scientists.
• In addition, some members interact strongly with
  the SLAC experimental program
• Interests of the group span a range of extremely
  challenging problems
• Group well integrated with Institute for
  Theoretical Physics at Stanford University
• See many opportunities for interaction with KAVLI
  Institute

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Computing
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Scientific Computing

• Data Driven Computing
• Large scale data management
• Driven by demands of BaBar
• Developing data management and GRID technology
  that will be needed for LHC
• Application Specific Computing
• Next generation accelerator modeling tools
• Large scale numerical simulations
• Positioned to support other applications
• Particle astrophysics
• Bio-molecular simulations
• .

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SLAC Long Range Planning Exercise
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Long Range Planning Exercise

• Scenarios for the Future of SLAC
• Develop models of SLAC as a partner in a future
  LC under different assumptions
• What might the ownership pieces of an LC be for
  SLAC in various scenarios?
• As we look towards our future, what are the other
  exciting physics opportunities for SLAC to be
  engaged in?
• What is the physics case?
• Cost and technical difficulty?
• Consider which activities might be appropriate in
  on-shore vs off-shore LC scenarios.
• How do scenarios fit into an overall picture of
  lab manpower and budget?

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Long Range Planning Exercise

• Process involves SLAC Staff, Faculty Users
• Chairs Tom Himel Persis Drell
• Goal Report to Director Fall 2003

Subcommittee A Raubenheimer (co-Ch) Paterson
(co-Ch) Brau Breidenbach Galayda Wolski Siemann Ro
ss
Subcommittee B Dixon (co-Ch) Seeman
(co-Ch) Burchat Colby Su Dong Hewett Jacobsen Kahn
Neal Schumm
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Summary
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The HEP Program at SLAC is focused on the central
issues of the field

• Pattern of heavy quark decays (B Factory)
• Electro-Weak Symmetry Breaking (Linear Collider)
• Physics beyond the SM
• Precision Electro-Weak (E158)
• Neutrino mass (EXO)
• Dark Matter, Dark Energy, Gamma Ray Bursts,
• Evolution of Early Universe (KIPAC, GLAST)
• Advanced Accelerator Techniques (FFTB, ORION)
• New Theoretical Frontiers

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The SLAC Program
X-ray Experiments in FTTB