Recent ATLAS results on exclusive dielectron and dimuon production in Pb+Pb UPC collisions

Relativistic heavy-ion beams at the LHC are accompanied by a large flux of equivalent photons. In ultrapripheral heavy-ion collisions (UPCs), electromagnetic interactions become dominant. One of the most fundamental processes, originating from the photon-photon interactions, is the exclusive production of lepton pairs, $\gamma\gamma\rightarrow\ell^{+}\ell^{-}$. Given the large theoretical uncertainty of photon flux modelling, its precise measurement with exclusive dilepton pairs can improve predictions for other photoproduction processes. The recent ATLAS measurements of $\gamma\gamma\rightarrow\mu^{+}\mu^{-}$ process using 2015 Pb+Pb data and $\gamma\gamma\rightarrow e^{+}e^{-}$ process using 2018 Pb+Pb data are presented.