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STAR Experiment at RHIC: - Physics Programs - Management Issues Nu Xu

STAR Experiment at RHIC: - Physics Programs - Management Issues Nu Xu. STAR Experiment at RHIC ( http://www.star.bnl.gov/ ) Fundamental Science: particle physics, nuclear physics, the QCD phase structure (QCD condense matter), astrophysics, cosmology, …

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STAR Experiment at RHIC: - Physics Programs - Management Issues Nu Xu

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  1. STAR Experiment at RHIC:- Physics Programs- Management IssuesNu Xu

  2. STAR Experiment at RHIC ( http://www.star.bnl.gov/ ) Fundamental Science: particle physics, nuclear physics, the QCD phase structure (QCD condense matter), astrophysics, cosmology, … State of Art Technology: detector R&D, simulation, IT, computing, massive/fast data managing, … - 550 scientists - 55 institutes - 13 countries - 130 PhD thesis since 2000 STAR Experiment

  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. Quantum Chromodynamics 1) Quantum Chromodynamics (QCD) is the established theory of strongly interacting matter. 2) Gluons hold quarks together forming hadrons: 3) Gluons and quarks, or partons, typically exist in a color singlet state: confinement. 4) Little is known about the QCD phase structure meson baryon

  5. QCD Phase Structure (a) (b) Gluon density (a) Small-x, large gluon density physics. Gluon saturation, origin of mass. (b) Hadron  QGP transition. Partonic degrees of freedom, confinement. (c) Proton spin structure. Helicity degrees of freedom, collective excitation  orbital motion. (c) Nucleon spin structure

  6. Phase diagram: A map shows that, at given degrees of freedom, how matter organize itself under external conditions. Phase Diagram QED QCD

  7. 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

  8. 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 and Muons Hyperons and Hyper-nuclei Heavy-flavor hadrons Jets Multiple-fold correlations among the identified particles!

  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: • - Charm hadron collectivity  • drag/diffusion constants  • Medium properties! • Light quark thermalization! • 200 GeV Au+Aum.b. collisions: • Charm hadron RAA • - Energy loss mechanism! • - QCD in dense medium! • - ΛC measurements

  11. STAR: Muon Telescope Detector beam pipe TPC TOF EMC magnet MTD Muon Telescope Detector (MTD) at STAR: MRPC technology; εμ ~ 45%; cover ~60% azimuthally and |y| < 0.25 TPC+TOF+MTD: μ/hadron enhancement factor ~ 102-3 For high pTμ-trigger, heavy quarkonia, light vector mesons, BJ/+X China-India-STAR collaboration: reviewed by BNL

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

  13. Timeline of QCD and Heavy Ion Facilities Spin STAR FGT Nu Xu, September 2009 BES STAR HFT RHIC-II eSTAR, EIC Others RHIC US LRP LHC FAIR CBM sis300 NICA J-PARC (50 GeV p+A) JLab(12 GeV upgrade) Spin Heavy Ion R&D Future programs

  14. 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

  15. STAR: Strong QCD physics programs for the next decade and beyond: 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 200 GeV and in-medium properties - QCD phase boundary and critical point Future: - Further develop the forward rapidity region - Evolve the collaboration to eSTAR and EIC

  16. Management Issues • STAR Council decides policy. • The management execute the policy. • One collaboration, one standard.

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