Electroweak boson measurements in $p$+Pb and Pb+Pb collisions with ATLAS

Abstract

Electroweak bosons produced in nucleus-nucleus collisions at LHC energies are excellent probes of the collision geometry and centrality. In proton-nucleus collisions, they provide insight into cold nuclear matter effects such as nuclear modifications of parton distribution functions or initialstate parton energy loss. This report presents the latest ATLAS results on massive electroweak boson production in Pb+Pb and pp collisions at √ s NN = 5.02 TeV using data collected by the ATLAS experiment in 2015, as well as a measurement of prompt photon production in p+Pb collisions at √ s NN = 8.16 TeV.