Study of exclusive production of the ρ meson in proton-lead data taken at CMS in 2013 at √ sNN = 5.02 TeV

The goal of this work is to measure of the cross section for ρ meson photoproduction on proton targets, at high center-of-mass energy. The LHC proton-lead data taken by CMS in 2013 is used to perform the measurement. After introducing the necessary theoretical elements and describing the experimental setup, exclusivity cuts are defined in order to lower as much as possible the background contribution. The residual contribution after the selection is estimated and subtracted from the observed signal. The dependence of ρ meson photoproduction cross section on the center-ofmass energy is estimated, as well as the t-differential cross section. Our results are in agreement with those from other experiments.