RIKEN CCJ Reseach Plan Form (2009/Mar.)


-------------------------------------------------------------------------
Fill the form below and send it to the the Planning and Coordination 
Office of RIKEN CCJ  (ccj-pco  -at- ribf.riken.jp) via E-mail.
If your project is a PHENIX-official one, please use another form.
'Official' requires a PWG's endorsement, for example.
-------------------------------------------------------------------------
                                                      Seq. Number (TBA   )
Research Plan at RIKEN CC-J 
				          Date: 22/10/2009 (DD/MM/YY)

To: the Planning and Coordination Office of RIKEN CC-J

Reseach Subject : Run9 W Analysis at PHENIX Central Arms

(PHENIX official or not :      no )

Person responsible for this reserch:
Name : Ken'ichi Karatsu
Tel/Fax : +81-75-753-3842
E-mail : karatsu@scphys.kyoto-u.ac.jp

Person responsible for the job submission:
Name : Ken'ici Karatsu
Tel/Fax : +81-75-753-3842
E-mail : karatsu@scphys.kyoto-u.ac.jp


Other collabrators in this research subject: Run9 W Analysis at PHENIX Central
Arms
Name : Kensuke Okada, Mickey Chiu, John Haggerty, Dave Kawall
tel/Fax:
E-mai: okada@bnl.gov, chiu@bnl.gov, haggerty@bnl.gov, kawall@physics.umass.edu
  

Summary of this research (5-10 lines)

One of the main goals of the RHIC spin program is to probe the polarization 
of sea quarks in the proton using W boson production. In spite of several
experiments to measure the proton spin structure so far, the uncertainty
of sea quark polarization still remains large, though the polarization
of valence quarks has been determined well by DIS and Semi-Inclusive DIS.
The production of W bosons is a clean way to measure the sea quark polarization 
due to the V-A coupling of W bosons to quarks, which means the chirarity and 
the flavor of interacting quarks are almost fixed. The first sqrt(s) = 500 GeV 
run at RHIC was held in early 2009 (RHIC Run 9), and the first attempt to 
measure W bosons at PHENIX Central Arms was also performed. The purpose of 
this research is to finalize the analysis of the measurement of W bosons at PHENIX.


Estimated CPU time required :  10000 hours (with Pentium III 1GHz)
  

Estimated disk space usage required :    200 GB
 

Estimated HPSS space usage required :    0

HPSS band width for above estimate  :    0  MB/s


Target date for completion (cpu) :  31/  3/ 2011  (DD/MM/YY)
                           (disk):  31/  3/ 2011   


Plan for the publication of this result (if possible)


Other useful infomation