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

2008; Elsevier BV; Volume: 670; Issue: 1 Linguagem: Inglês

10.1016/j.physletb.2008.10.040

1873-2445

L. Frankfurt, M. Strikman, M. Zhalov,

Black Holes and Theoretical Physics

We evaluate the large momentum transfer J/ψ photoproduction with rapidity gaps in ultraperipheral proton–ion collisions at the LHC which provides an effective method of probing dynamics of large t elastic hard QCD Pomeron interactions. It is shown that the experimental studies of this process would allow to investigate the energy dependence of cross section of elastic scattering of a small cc¯ dipole off the gluon over a wide range of invariant energies 103<scc¯-gluon<106 GeV2. The accessible energy range exceeds the one reached in γp at HERA by a factor of 10 and allows the kinematic cuts which improve greatly sensitivity to the Pomeron dynamics as compared to the HERA measurements. The cross section is expected to change by a factor ⩾20 throughout this interval and our estimates predict quite reasonable counting rates for this process with the several of the LHC detectors.