Proposal for a PHENIX officail work at PHENIX Computing Center in Japan (CC-J) Date: / / (DD/MM/YY) To: the Planning and Coordination Office of CC-J Title : Correlation measurement for A_{LL} at pp200GeV. PWG : SPIN (PHENIX official or not : official ) Liason: Name : Kimiaki Hashimoto Tel/Fax : 090-8511-3794 E-mail : kimiaki@ribf.riken.jp Person responsible for the job submission: Name : SAME Tel/Fax : SAME E-mail :SAME Purpose of the work: (5-10 lines) A_{LL} measurement via single inclusive pi0 production have a large statistics but ver y wide bjorken-x range. In other words, ¡Èresolution" of bjorken-x is large. If two incoming polarized patrons have almost same bjorken-x(momentum fraction)(x1~x2), Lorentz boost of incoming and scattered patrons system become small. Hence two scattered patrons and its decayed hadrons are measured by PHENIX Central arm. So two back-to-back hadron pair can reject x1>>x2,x1<