Prospect for a measurement of the Weak Mixing Angle in $pp \rightarrow Z/\gamma^* \rightarrow e^+e^-$ events with the ATLAS detector at the High Luminosity Large Hadron Collider

This document describes a sensitivity study for the determination of the weak mixing angle from the measurement of the Z boson forward-backward asymmetry using $3000$ fb$^{-1}$ of data to be collected by the ATLAS experiment with proton proton collisions at $\sqrt{s} =14$ TeV at the High Luminosity Large Hadron Collider.