Search sensitivity for dark photons decaying to displaced muons with CMS at the high-luminosity LHC

This note presents sensitivity studies for a search for pairs of displaced muons originating from long-lived dark photons using the Phase-2 CMS detector at the high-luminosity LHC with an integrated luminosity of $3000~\mathrm{fb}^{-1}$. Projected sensitivities are obtained for broad ranges of dark photon masses ($1-30~\mathrm{GeV}$) and lifetimes ($c\tau = 0.01 -10~\mathrm{m}$) in the context of Dark Supersymmetry models.