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STAR Experiment

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STAR Experiment

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  1. STAR Physics Program - Spin Structure of Proton - Properties of QCD Matter at Extreme Conditions - QCD Phase Structure Nu Xu(1) Nuclear Science Division, Lawrence Berkeley National Laboratory Berkeley, USA(2) College of Physical Science and Technology, Central China Normal University Wuhan, China

  2. STAR Experiment STAR Experiment at RHIC ( http://www.star.bnl.gov/ ) Fundamental science: particle physics, nuclear physics, astrophysics, cosmology, … State of art technology: detector R&D, simulations, IT, computing, mass/fast data managing, … - 550 scientists - 55 institutes - 13 countries - 130 PhD thesis since 2001

  3. 1) At 200 GeV top energy - Study medium properties, EoS - pQCD in hot and dense medium 2) RHIC beam energy scan (BES) - Search for the QCD critical point - Chiral symmetry restoration STAR Physics Focus Forward program - Study low-x properties, initial condition, search for CGC - Study elastic and inelastic processes in pp2pp Polarized p+p program - Study proton intrinsic properties

  4. STAR Detectors Fast and Fullazimuthal particle identification EMC+EEMC+FMS (-1 ≤  ≤ 4) TPC TOF DAQ1000 HFT 2013 FGT 2011 BNL PAC, 21 - 22, 2010 MTD 2013

  5. Particle Identification at STAR TPC ToF TPC STAR TPC K pd π e, μ STAR ToF Log10(p) STAR MTD STAR HFT STAR EMC Neutral particles Strange Jets Heavy Quark hyperons Hadrons Multiple-fold correlations among the identified particles!

  6. TOF Performance (2010) √sNN = 39 GeV Au + Au Collisions TPCTPC+ToF

  7. STAR Upgrade Timeline* *Upgrades - Funding driven schedules

  8. FGT HFT Forward GEM Tracker (2011) FGT: RHIC CE project Six light-weight triple-GEM disks New mechanical support structure Planned installation: Summer 2011 • Full charge-sign discrimination at high-pT • Design polarization performance of 70% to collect at least 300pb-1

  9. Heavy Flavor Tracker(2014) SSD IST PXL HFT Magnet Return Iron FGT EAST Solenoid Identify heavy flavor hadron directly Precision measurement HF hadron energy loss and collectivity WEST

  10. HFT: Charm Hadron v2 and RAA • 200 GeV Au+Aum.b. • collisions (500M events). • - Charm hadron collectivity  • drag/diffusion constants  • Medium properties! • Light quark thermalization! • 200 GeV Au+Aum.b. • collisions (|y|<0.5 500M events) • Charm hadron RAA • - Energy loss mechanism! • - QCD in dense medium!

  11. Muon Telescope Detector (2013) beam pipe TPC TOF EMC magnet MTD Muon Telescope Detector (MTD) at STAR: MRPC technology; με ~ 45%; cover ~60% azimuthally and |y| < 0.25 TPC+TOF+MTD: muon/hadron enhancement factor ~ 102-3 For high pTmuon trigger, heavy quarkonia, light vector mesons, BJ/+X China-India-STAR collaboration: a proposal sub. to BNL 02/2010.

  12. STAR QCD physics program for next decade: Spin Physics: (cold nucleon) - 200 GeV: Δginclusive and di-jets, γ-jet - 500 GeV: sea quark helicity distributions - 200/500 GeV: transverse spin phenomena Low-x Physics:(cold nucleus) - Study gluon-rich phenomena at RHIC - Color glass condensate Heavy Ion Physics:(hot nuclear matter) - Thermalization at √sNN = 200 GeV - QCD phase boundary and critical point - In medium properties Summary

  13. Decadal Plan see Carl’s talk Charge for new decadal plans for STAR and PHENIXby Steve Vigdor, Dec. 17, 2009http://drupal.star.bnl.gov/STAR/event/2009/12/10/star-management-meetingdue date: Oct. 1, 2010 Decadal Plan C. Gargliardi Spin B. Surrow Heavy Ion J. Dunlop Upgrade F. Videbaek

  14. eRHICDesign eRHIC detector injector 2 SRF linac 1 -> 5 GeV per pass 4 (6) passes Coherent e-cooler RHIC: 325 GeV p or 130 GeV/u Au with DX magnets removed ePHENIX eSTAR S. Vigdor: 2010 Operation review

  15. STAR Experiment MTD EMC Barrel MRPC ToFBarrel ALICE Technology EMC End Cap FMS BBC FHC FPD TPC pp2pp’ pp2pp’ PMD trigger computing DAQ1000 COMPLETE HLT HFT FGT Ongoing R&D

  16. 有客之远方来，不亦乐乎！

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