A proposal for the measurement of the weak mixing angle at the HL-LHC

A proposal is presented for measuring the weak mixing angle using the forward-backward asymmetry of Drell-Yan dimuon events in pp collisions at $\sqrt{s} = 14~\mathrm{TeV}$ with the CMS detector at the high luminosity LHC (HL-LHC). In addition to the increased luminosity, the upgraded part of the muon system extends the pseudorapidity coverage of the CMS experiment to $|\eta| < 2.8$ for muons. Since the measurement has higher sensitivity in this pseudorapidity region, both the statistical and systematic uncertainties will be significantly reduced. To estimate the increased potential for this measurement we use a Monte Carlo data sample of pp events corresponding to a luminosity of $3000~\mathrm{fb}^{-1}$ and compare to the recent CMS measurements at $\sqrt{s} = 8~\mathrm{TeV}$.