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Charm Research in Heavy Ion Experiment

Charm Research in Heavy Ion Experiment. For the HIM_SRC (Center for Quark Matter). Pusan National Univeristy HIPEx Lab. In-Kwon YOO. Research Strategy. Computing Infrastructure Warming up L */K* at SPS Charm Production at RHIC D  K - p + L C pK - p + Charm Production at LHC.

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Charm Research in Heavy Ion Experiment

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  1. Charm Research in Heavy Ion Experiment For the HIM_SRC (Center for Quark Matter) Pusan National Univeristy HIPEx Lab. In-Kwon YOO

  2. Research Strategy • Computing Infrastructure • Warming up • L*/K* at SPS • Charm Production at RHIC • DK-p+ • LCpK-p+ • Charm Production at LHC HIM 2008-07

  3. Star Asian Computing Center • Computing Infrastructure with massive data from STAR • Frontier Research • Maximum Use of IT resources in Korea • Data Transfer • Cluster Computing with Supercomputer • Mass Storage • Korean Institute for Science and Technology Informations (KISTI @ Daejoen) • Korean HUB for GLORIAD + KREONET • Super Computing Resources • Mass Storage Management • Asian Supercomputing HUB : - BNL – NERSC – KISTI – SSC etc. HIM 2008-07

  4. STAR Computing HIM 2008-07

  5. Cluster system Dr. SDLee in KISTI HIM 2008-07  Phase 2 system(286TFlops) includes 24TFlops for phase 1 system replacement

  6. SMP system HIM 2008-07

  7. Research Networks • KREONET HIM 2008-07

  8. GLORIAD HIM 2008-07

  9. What-to-Do List at KISTI-PNU in 2008 • STAR Software Infrastructure (SofI) • Data Location Tools • Resource Monitoring Tools • Web Sanity, Documentation Tools • HPSS Tools & Services • Data Transfer (20~50TB) from NERSC/BNL to KISTI • Data Locating and Service Setup (Data Carousel) • Root4STAR/ STARSim Setup/Configuration • Computing • Code Optimization • Parallel Computing HIM 2008-07

  10. SACC Working Group • PNU • IKYoo / JHKim (PhD st.) / KEChoi (MA st.) • BNL (STAR) • Jlauret : STAR S&C Leader / JDunlop : STAR Deputy • LBNL (PDSF) • NXu : STAR Spokesperson, MoUs • SSC (Tsinghua Univ.) • ZXiao : KR-CN Funding Agency HIM 2008-07

  11. Plan of STAR Collaboration at KISTI • KISTI Resources Plans for STAR • KISTI Manpower for STAR Network Specialist Dr. Dong Kyun KIM, Computer Scientist System Engineer Mr. Jun WOO, Computer Engineering (Master Degree) Storage Manager Mr. Kelvin CHOI, Computer Science (Master Degree) Physics Research Dr. Hyun Woo KIM, Physicist (Particle Physics) HIM 2008-07

  12. p L* K* K p K L*/K* Motivation • How many K*, L* at chemical freeze-out? • How long do they live? • How many are their daughter absorbed in medium? Chemical Freezeout Kinetic Freezeout Resonance K(892) (1520) Decay channel K +  p +K Width [MeV] 50.8 15.6 Life time [fm/c] 3.9 13 Comparison of p+p, Pb+Pb @ 158 AGeV HIM 2008-07

  13. Signal Reconstruction pp pp PbPb PbPb PRELIMINARY PRELIMINARY HIM 2008-07

  14. Results peripheral central PRELIMINARY HIM 2008-07

  15. Discussion & Outlook • Strangeness Enhancement vs. Suppression • Suppressed L*  Medium Effect ? (excited) Baryon Effect ? • Lifetime (Dt) betw. chemical and kinetic freezeout > 4fm/c (K* lifetime) ? (UrQMD  Dt ~ 5fm/c !) • Consistency check • System Size dependency check for L* • http://fermium.phys.pusan.ac.kr/HeavyIon/CERN/NA49/na49@KISTI/Lambda1520KISTI.htm HIM 2008-07

  16. Secondary Vertex Resolution Study at STAR < Motivation > (1) Secondary Vertex Resolution shows Position Resolution of our Detector (2) Secondary Vertex Resolution information can be used as a cut which has short decay length like D-meson(123.0 ) < How ? > : We can reconstruct secondary vertices which from Conversion Gamma at our material budget and compare with real material budget KEChoi in PNU HIM 2008-07

  17. STAR Detector & Conversion Gamma Front view Side view HIM 2008-07 What we are looking for is like this ...

  18. Dataset & Particle Identification Dataset : CuCu@200GeV Number of event : 30M events HIM 2008-07 [All track] [Selected electron track]

  19. Applied Cuts Part I. V0 definition Part II. Opening Angle Cut : Remove electrons from Dalitz decay HIM 2008-07

  20. HIM 2008-07

  21. HIM 2008-07

  22. HIM 2008-07

  23. HIM 2008-07

  24. Outlook • SACC@KISTI (Oct08) • STAR • D Analysis with SVT (Nov08) • LC Reconstruction with SVT (Feb09) • QC Dp Reconstruction (09) • NA49 • L* Signal at SPS (Fall 08) • ALICE • LC Simulation (Winter 08) HIM 2008-07

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