CMS Collaboration2019-09-202019-09-202019-08-05Sirunyan, A.M., Tumasyan, A., Adam, W. et al. Eur. Phys. J. C (2019) 79: 702. https://doi.org/10.1140/epjc/s10052-019-7202-9https://hdl.handle.net/1808/29609Exclusive ρ(770) 0 photoproduction is measured for the first time in ultraperipheral pPb collisions at √ s NN = 5.02 TeV with the CMS detector. The cross section σ(γp → ρ(770) 0p) is 11.0 ± 1.4 (stat) ± 1.0 (syst) μb at Wγ p = 92.6GeV for photon–proton centre-of-mass energies Wγ p between 29 and 213 GeV. The differential cross section dσ/d|t| is measured in the interval 0.025 < |t| < 1GeV2 as a function of Wγ p , where t is the squared four-momentum transfer at the proton vertex. The results are compared with previous measurements and theoretical predictions.The measured cross section σ(γp → ρ(770) 0p) has a power-law dependence on the photon–proton centre-of-mass, consistent with electron–proton collision measurements performed at HERA. The Wγ p dependence of the exponential slope of the differential cross section dσ/d|t| is also measured.© CERN for the benefit of the CMS collaboration 2019 Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.http://creativecommons.org/licenses/by/4.0/Article10.1140/epjc/s10052-019-7202-9openAccess