Semiexclusive production of J/ψ mesons in proton-proton collisions with electromagnetic and diffractive dissociation of one of the protons

We calculate the cross sections for both electromagnetic and diffractive dissociation of protons for the semiexclusive production of J/ψ mesons in proton-proton collisions at the LHC. Several differential distributions in missing mass (MX), or single-particle variables related exclusively to the J/ψ meson are calculated for s=7and13 TeV. The cross sections and distributions are compared to the cross section of the purely exclusive reaction pp→ppJ/ψ. We show the corresponding ratio as a function of J/ψ meson rapidity. We compare the distributions for purely electromagnetic and purely diffractive proton excitations/dissociation. We predict cross sections for electromagnetic and diffractive excitations of similar order of magnitude.