Research Plan at RIKEN CC-J
				          Date:   05/12/08   (DD/MM/YY)

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

Reseach Subject : Transverse single spin asymmetry of di-hadron production in pp

(PHENIX official or not :       no )

Person responsible for this reserch:
Name : Ruizhe Yang
Tel/Fax : +1-217-721-8473
E-mail : ruizhe.yang@gmail.com

Person responsible for the job submission:
Name : Ruizhe Yang
Tel/Fax : +1-217-721-8473
E-mail : ruizhe.yang@gmail.com


Other collabrators in this research subject:
Name : Matthias Grosse-Perdekamp
tel/Fax: +1-217-344-9663
E-mai: mgp@uiuc.edu


Summary of this research (10-100 lines)

The quark transversity distribution function can be measured when
coupling with another chrial-odd function, e.g., the
spin-dependent di-hadron fragmentation function.  This is a
unique way of accessing transversity distribution function in
proton-proton collision in that it does not require any knowledge
of the jet axis for a given event.  PHENIX took transverse
polarized proton-proton data in 2006 and 2008.  Using these data
sets the di-hadron single spin asymmetry can be probed at percent
level.



Estimated CPU time required :    500  hours (with Pentium III 1GHz)


Estimated disk space usage required :  150  GB


Estimated HPSS space usage required :  0

HPSS band width for above estimate  :       MB/s


Target date for completion (cpu) :  01 / 02 / 09  (DD/MM/YY)
                           (disk):  01 / 05 / 09


Plan for the publication of this result (if possible)

still to be determined, probably in 1~2 years


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