Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-07-14
Phys.Lett.B670:32-36,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
16 pages, 5 figures
Scientific paper
10.1016/j.physletb.2008.10.040
We evaluate the large momentum transfer $J/\psi$ 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 $c\bar c$ dipole off the gluon over a wide range of invariant energies 10^3 < s_{c\bar c - gluon} < 10^6 GeV^2. The accessible energy range exceeds the one reached in \gamma p 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 \ge 20 throughout this interval and our estimates predict quite reasonable counting rates for this process with the several of the LHC detectors.
Frankfurt Leonid L.
Strikman Mark
Zhalov Michael
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