Exclusive photoproduction of heavy quarkonia pairs

TL;DR

This paper investigates the high-energy exclusive photoproduction of heavy quarkonia pairs using the Color Glass Condensate approach, providing numerical estimates of cross-sections relevant for upcoming collider experiments.

Contribution

It introduces a novel mechanism for producing heavy quarkonia pairs with opposite charge parities and estimates their cross-sections in future collider kinematics.

Findings

Cross-sections are within experimental reach.

Produced quarkonia pairs have opposite charge parities.

The mechanism yields larger cross-sections than same C-parity pairs.

Abstract

In this paper we study the high energy exclusive photoproduction of heavy quarkonia pairs in the leading order of the strong coupling constant $\alpha_{s}$. In the suggested mechanism the quarkonia pairs are produced with opposite charge parities, and have predominantly oppositely directed transverse momenta. Using the Color Glass Condensate approach, we estimated numerically the production cross-sections in the kinematics of the forthcoming electron-proton colliders, as well as proton-ion colliders in ultraperipheral collisions. We found that the cross-sections are within the reach of planned experiments and can be measured with reasonable precision. The suggested mechanism has significantly larger cross-section than that of the same $C$-parity quarkonia pair production.