Investigation of diffractive photoproduction of $J/\Psi$ in hadronic collisions

In this work we study the diffractive photoproduction of $J/\Psi$ in proton-proton, proton-nucleus, and nucleus-nucleus collisions at Large Hadron Collider energies using the color dipole formalism and different models for the forward dipole-target scattering amplitude. Our goal is to estimate the theoretical uncertainty present in the current predictions in the literature. Our results are compared with the experimental data and predictions for higher energies are presented.

Figure 1

Diffractive photoproduction of $J/\Psi$ in (a) $\gamma p$ and (b) $\gamma \text{Pb}$ collisions. Data are from HERA [58].

Figure 2

Rapidity distribution for the diffractive photoproduction of $J/\Psi$ in $pp$ collisions at (a) $\sqrt{s}=7$ TeV and (b) $\sqrt{s}=14$ TeV. Data are from the LHCb Collaboration [22, 23].

Figure 3

Rapidity distribution for the diffractive photoproduction of $J/\Psi$ in PbPb collisions at (a) $\sqrt{s}=2.76$ TeV and (b) $\sqrt{s}=5.5$ TeV. Data are from the ALICE Collaboration [20, 21].

Figure 4

Rapidity distribution for the diffractive photoproduction of $J/\Psi$ in $p\text{Pb}$ collisions at $\sqrt{s}=5$ TeV.