Measurement of Longitudinal Single-Spin Asymmetries at Forward Rapidity for W Boson Production in Polarized proton+proton Collisions at √s=510 GeV at STAR

The production of W$^{-(+)}$ bosons in polarized proton collisions provides an ideal tool to study the spin-flavor structure of the proton sea quark distributions profiting from the parity violating nature of weak interactions. W$^{-(+)}$ bosons are produced in ${\bar{u}+d}$ (${\bar{d}+u}$) annihilation and can be detected through their leptonic decay mode. The STAR experiment has the ability to detect charged leptons e$^{-(+)}$ at mid and forward rapidity regions. In this analysis we focus on the forward region ($1< $ $\eta$ $< 2$) . The analysis status of the measurement of the longitudinal single-spin asymmetries at forward rapidity for W boson production will be presented based on a data sample collected in 2013 corresponding to an integrated luminosity $\sim$ 250 pb$^{-1}$ with an average beam polarization $\sim$ 54 \%.