Identification of Pions, Kaons, and Protons in Photonuclear Events at STAR

In heavy ion collisions, a photonuclear event occurs when one ultrarelativistic nucleus emits a photon which collides with the other intact nucleus, similar to an e + A collision except that the photon tends to have a much smaller virtuality. Comparing particle spectra from these γ + A events to observations in A + A collisions will allow us to distinguish between what effects come from nuclear structure and what effects are from the medium. These measurements are done at the STAR experiment for Au + Au data with √s_NN = 54 GeV and will show the π, K, and p spectra as a function of both p_T and η. Measurements of particle spectra in photonuclear events will help inform future measurements using particle identification at the EIC.