Large t diffractive rho-meson photoproduction with target dissociation in ultraperipheral pA and AA collisions at LHC

Abstract

We demonstrate that study of large t vector meson photoproduction with rapidity gaps in ultraperipheral proton-ion and ion-ion collisions at LHC would allow to investigate the energy dependence of cross section of elastic scattering of a small dipole off the parton over a wide range of energies $10^3<s_{dipole-parton}<10^{6}Ge{V}^2$ where this cross section is expected to change by a factor $\ge 20$. The accessible energy range exceeds the one reached at HERA by a factor of 10 both in $\gamma p$ and in $\gamma A$ scattering. In addition, study of A-dependence of this process will allow to determine the t range where interaction of small dipoles gives the dominant contribution and to investigate effects of absorption for the propagation of ultrarelativistic small $q\bar{q}$ dipoles through the nuclear media and probe in a novel way onset of the black disk regime.

25 pages, 11 figures

References in corpus (3)

• Energy losses in the black disc regime and correlation effects in the STAR forward pion production in dAu collisions
• Asymptotics and preasymptotics at small x
• The casuality and/or energy-momentum conservation constraints on QCD amplitudes in small x regime

Cited by in corpus (1)

• Large t diffractive J/ψphotoproduction with proton dissociation in ultraperipheral pA collisions at LHC