Study Quark and Antiquark Contribution to Proton Spin Structure at RHIC.

Relativistic Heavy Ion Collider (RHIC) provides a unique opportunity for the direct measurement of quark and antiquark spin in proton utilizing the parity-violating feature of W boson production. Through probing the decay leptons from W bosons in the central and forward rapidity region, RHIC can dissociate contributions from different flavors of quarks to the proton spin with very high accuracy. The capabilities of the spin flavor dissociation at RHIC with current detector configuration and future upgrades are described. © 2005 American Institute of Physics [ABSTRACT FROM AUTHOR]