Prospects for measurement of the weak mixing angle at LHCb

We project the potential sensitivity to the weak mixing angle in future measurements by LHCb Upgrade II at the High Luminosity LHC. The LHCb experiment covers forward rapidities at the LHC, and expects to record at least 300$\text{ fb}^{-1}$ of data. The studies presented here consider a measurement of the weak mixing angle by analysing the forward-backward asymmetry in Drell-Yan events. We present expectations for both the statistical sensitivity of such measurements with integrated luminosities up to 300$\text{ fb}^{-1}$, and the uncertainties due to knowledge of the parton distribution functions.