Photoproduction of Upsilon states in ultraperipheral collisions at the CERN Large Hadron Collider within the color dipole approach

TL;DR

This paper models the exclusive photoproduction of upsilon states in ultra-peripheral collisions at the LHC using the color dipole approach, providing predictions for various collision types and comparing with experimental data.

Contribution

It applies the light-cone color dipole formalism to predict upsilon production in different collision systems at LHC energies, incorporating saturation and shadowing effects.

Findings

Predicted rapidity and transverse momentum distributions for upsilon states.

Model shows robustness when compared with experimental results.

Provides comprehensive predictions for upsilon production at LHC energies.

Abstract

The exclusive photoproduction of upsilon states $\Upsilon(1S)$ and its radially excited states $\Upsilon(2S,3S)$ is investigated in the context of ultra-peripheral collisions at the LHC energies. Predictions are presented for their production in proton-proton, proton-nucleus and nucleus-nucleus collision at the energies available at the LHC run 2. The rapidity and transverse momentum distributions are shown, and the robustness of the model is tested against the experimental results considering $\psi(1S,2S)$ and $\Upsilon(1S)$ states. The theoretical framework considered in the analysis is the light-cone color dipole formalism, which includes consistently parton saturation effects and nuclear shadowing corrections.