Spin Physics at RHIC

• Spin Structure of the Nucleon

  • : Gluon polarization via g,p0,heavy quark productions
  • : Anti-quark polarization via Drell-Yan (W,Z,g*)
  • : Quark transversity

• Symmetry Tests

  • parity violating effects, e.g. compositeness

• QCD Selection Rule

  • switch off gluon; aTT/aLL<ə

• Single Transverse Spin Asymmetry AN

  • large at low Energy; higher-twist? ; kT asymmetry?

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