Measurement of exclusive  photoproduction in ultraperipheral pPb collisions at

Exclusive $$ photoproduction is measured for the first time in ultraperipheral pPb collisions at $$ with the CMS detector. The cross section $$ is $$ $$ b at $$ for photon-proton centre-of-mass energies $$ between 29 and $$ . The differential cross section $$ is measured in the interval $$ as a function of $$ , where t is the squared four-momentum transfer at the proton vertex. The results are compared with previous measurements and theoretical predictions. The measured cross section $$ has a power-law dependence on the photon-proton centre-of-mass, consistent with electron-proton collision measurements performed at HERA. The $$ dependence of the exponential slope of the differential cross section $$ is also measured.