Diffractive photoproduction of radially excitedψ(2S)mesons in photon-Pomeron reactions in PbPb collisions at energies available at the CERN Large Hadron Collider

Abstract

In this work we investigate the photoproduction of radially excited vector mesons off nuclei in heavy ion relativistic collisions. In particular, we analyze the exclusive photoproduction of ψ(2S) off nuclei, evaluating the coherent and the incoherent contributions to that process. The theoretical framework used in the present analysis is the light-cone dipole formalism and predictions are done for PbPb collisions at the CERN-LHC energy of 2.76 TeV. The theoretical uncertainties are analyzed and comparison is also done to the recent ALICE Collaboration data for the ψ(1S) state photoproduction.

Exclusive photoproduction of quarkonium in proton-nucleus collisions at energies available at the CERN Large Hadron Collider

“…[7], the gluon shadowing correction was introduced and the model sensitivity was analyzed. It was found that a strong model dependence on predictions existed.…”

“…Here, we consider the energy dependence of the slope using a Regge motivated expression [6]. In our numerical calculation, corrections for the skewedness and real part of the amplitude have also been included [7]. On the other hand, the exclusive photoproduction off nuclei for coherent processes can be computed in a simple way in the large coherence length c R A limit [8,9]:…”

Coherent photo-nuclear production of vector mesons at mid-rapidities in Pb-Pb collisions

“…The cross section is compared to the same set of models as for the J/ψ. The GM model was updated to the GDGM model [15] using the by then published measurement of coherent J/ψ production. Again the EPS09 parameterisation describes best the data.…”

Coherent and incoherent production of vector mesons in ultraperipheral collisions of xenon ions within the QCD parton saturation approach

“…The detailed analysis related to the radial excitations of charmonia was investigated in Refs. [9][10][11], where the momentum transfer distribution has been also addressed.…”