Research Plan at RIKEN CC-J Date: 21/09/07 (DD/MM/YY) To: the Planning and Coordination Office of RIKEN CC-J Reseach Subject : Study of direct photon via internal conversion in Run5pp (PHENIX official or not : no ) Person responsible for this reserch: Name : Yorito Yamaguchi Tel/Fax : 048-464-4285/048-464-4554 E-mail : yorito@cns.s.u-tokyo.ac.jp Person responsible for the job submission: Name : Yorito Yamaguchi Tel/Fax : 048-464-4285/048-464-4554 E-mail : yorito@cns.s.u-tokyo.ac.jp Other collabrators in this research subject: Name : tel/Fax: E-mai: Summary of this research (10-100 lines) Measurement of direct photons with low pT are one of the most important measurements to investigate the properties of QGP since they are considered to be one by thermal emission in QGP phase and can carry the thermodynamical information of QGP directly. In 'real' photon measurement in Au+Au collisions, the large systematic error cannot be reduced in the low pT region. On the other hands, 'virtual' photon measurement via internal conversion in Au+Au collisions has been carried out with much less systematic error. Direct photon measurement via internal conversion in p+p collisions is absolutely important as a reference for comparison with the result in Au+Au collisions. Estimated CPU time required : 5000 hours (with Pentium III 1GHz) Estimated disk space usage required : 150 GB Estimated HPSS space usage required : HPSS band width for above estimate : MB/s Target date for completion (cpu) : 31/03/08 (DD/MM/YY) (disk): 31/03/08 Plan for the publication of this result (if possible) Other useful infomation