  To measure spin-dependent parton distribution functions in the production of
W bosons at the Relativistic Heavy Ion Collider, an accurate model for
distributions of charged leptons from the W boson decay is needed. We present
single-spin lepton-level cross sections of order $\alpha_S$ for this process,
as well as resummed cross sections, which include multiple parton radiation
effects. We also present a program RhicBos for the numerical analysis of
single-spin and double-spin cross sections in the Drell-Yan process, W and Z
boson production.
