We calculate distributions of different vector mesons in purely exclusive ($pp\to ppV$) and semiexclusive ($pp\to pXV$) processes with the electromagnetic dissociation of a proton. The cross section for the electromagnetic dissociation is expressed through electromagnetic structure functions of the proton. We include the transverse momentum distribution of initial photons in the associated flux. Contributions of the exclusive and semiexclusive processes are compared for different vector mesons ($V=\varphi$, $J/\psi$, $\mathrm{\Upsilon }$). We discuss how the relative contribution of the semiexclusive processes depends on the mass of the vector meson as well as on different kinematical variables of the vector meson ($y$, $p_t$). The ratio of semiexclusive to exclusive contributions are shown and compared for different mesons in different variables.

• Received 17 October 2019

DOI:https://doi.org/10.1103/PhysRevD.100.114022

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Published by the American Physical Society