Probing charmonium-like XYZ states in hadron-hadron ultraperipheral collisions and electron-proton scattering

TL;DR

This paper investigates the production of charmonium-like XYZ states in ultraperipheral collisions and electron-proton scattering using effective Lagrangian methods, providing predictions for future experimental observations.

Contribution

It offers the first detailed predictions of cross sections and rapidity distributions for XYZ states in UPCs and electron-proton scattering, aiding future experimental searches.

Findings

Predicted significant production rates for X(3872) and Zc(3900) in pA UPCs.

Electron-Ion Collider in China can effectively observe XYZ states.

Provided theoretical estimates to guide experimental detection efforts.

Abstract

Exclusive production of charmonium-like XYZ states in hadron-hadron ultraperipheral collisions(UPCs) and electron-proton scattering is studied employing effective Lagrangian method. Total cross sections and rapidity distributions of charmonium-like XYZ states are obtained in hadron-hadron UPCs and electron-proton scattering process. These predictions can be applied to estimate the observed event number of exclusive charmonium-like XYZ states in hadron-hadron UPCs and electron-proton scattering. The results indicate that it is significant to search $X(3872)$ and $Z^+_c(3900)$ in pA UPCs and Electron-Ion Collider in China will be an advantage platform to observe XYZ states in the future.