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We evaluate the large momentum transfer $J/\psi$ photoproduction withrapidity gaps in ultraperipheral proton-ion collisions at the LHC whichprovides an effective method of probing dynamics of large t elastic hard QCDPomeron interactions. It is shown that the experimental studies of this processwould allow to investigate the energy dependence of cross section of elasticscattering of a small $c\bar c$ dipole off the gluon over a wide range ofinvariant energies 10^3 < s_{c\bar c - gluon} < 10^6 GeV^2. The accessibleenergy range exceeds the one reached in \gamma p at HERA by a factor of 10 andallows the kinematic cuts which improve greatly sensitivity to the Pomerondynamics as compared to the HERA measurements. The cross section is expected tochange by a factor \ge 20 throughout this interval and our estimates predictquite reasonable counting rates for this process with the several of the LHCdetectors.

Large t diffractive J/\psi photoproduction with proton dissociation in ultraperipheral pA collisions at LHC