Seq. Number (TBA ) Research Plan at RIKEN CC-J Date: 08/06/05 (DD/MM/YY) To: the Planning and Coordination Office of RIKEN CC-J Reseach Subject : Study of hadron production at RHIC-PHENIX run4/5 (PHENIX official or not : official / no ) No Person responsible for this reserch: Name : Masaya Oka Tel/Fax : +81-298-53-6121(Tel and Fax) E-mail : oka@bnl.gov Person responsible for the job submission: Name : Masaya Oka Tel/Fax : +81-298-53-6121(Tel and Fax) E-mail : oka@bnl.gov Other collabrators in this research subject: Name : Masahiro Konno Tel/Fax : +81-298-53-6121(Tel and Fax) E-mail : konno@bnl.gov Summary of this research (10-100 lines) The PHENIX experiment has measured identified hadron spectra in Au+Au, Cu+Cu and p+p collisions at (s_{NN})^(1/2) = 200, 62.4 and 22.4 GeV. The spectra at low transverce momentum are well described by the hydrodynamic framework, and the statistical thermal models reproduce the measured particle ratios. The bulk properties of the hot and dense matter at RHIC can be extracted, such as chemical and freeze-out temperatures, expansion velocity, and baryon chemical potential. And, unlike mesons, baryons are not suppressed at intermediate transverce momentum region. This has prompted the development of a new theoretical framework, quark recombination, however, the agreement between recombination models and data is still qualitative. The systematic measurement of identified hadron spectra up to large transverce momentum region is crucial for the further understanding of hadron production at RHIC energies. We'd like to study a this production. In order to obtain the acceptance correction factors and tracking efficiencies (embedding) for pi/K/p hadron spectra under Run4 and Run5 configurations. We plan to run PISA, and produce nDST for single hadron MC simulation (pi/K/p, both charges). Also, the embedding study and the actual analysis are included. This simulation study is intended for QM05. Estimated CPU time required : hours (with Pentium III 1GHz) Estimated disk space usage required : 500 GB Estimated HPSS space usage required : HPSS band width for above estimate : MB/s Target date for completion (cpu) : 31/ 12/ 05(DD/MM/YY) (disk): 31/ 12/ 05 Plan for the publication of this result (if possible) Other useful infomation