STAR Forward Upgrade Study

<FCS phi acceptance & SSA>

Simulation: Pythia 6.4.28 with CDF-TuneA @ sqrt(s)=500GeV

1. Simple Phi Cut

  1.1 Single Pion Study

  see the attachment:
  STAR_forward_study_FCSphi_pion.pdf

  1.2. Inclusive Jet Study

  see the attachment:
  STAR_forward_study_FCSphi_jet_v1.pdf

  Conclusion: No significant impact to the extracted Sivers asymmetry and Collins asymmetry

2. More "realistic" Acceptance Model

   TBD