The STAR W Physics Program at RHIC

The production of $W^{-(+)}$ bosons in polarized proton-proton collisions provides an ideal tool to study the spin-flavor structure of the proton, namely the polarized and unpolarized light quark sea asymmetries. $W^{-(+)}$ bosons are produced in $\bar{u}+d\,(\bar{d}+u)$ collisions and can be detected through their leptonic decays, $e^{-}+\bar{\nu}_{e}\,(e^{+}+\nu_{e})$, where only the respective charged lepton is measured. The discrimination of $\bar{u}+d (\bar{d}+u)$ quark combinations requires distinguishing between high $p_{T}$ $e^{-(+)}$ through their opposite charge sign, which in turn requires precise tracking information. In spring 2009, STAR recorded its first data set at $\sqrt{s}=500$GeV which allows for a first measurement of the cross section and single helicity asymmetry for $W^{-(+)}$ production at mid-rapidity in polarized proton-proton collisions. The status of the $W^{-(+)}$ production analysis will be presented.