Novel aspects of particle production in ultra-peripheral collisions

TL;DR

This paper explores how ultra-peripheral collisions can be used to study exotic charmonium states and magnetic field effects, by calculating cross sections for specific particle productions.

Contribution

It introduces methods to utilize ultra-peripheral collisions for investigating exotic states and magnetic effects, providing new computational insights.

Findings

Calculated cross section for $D^+ D^-$ molecular state production.

Showed magnetic field can induce pion production in target.

Both processes have measurable cross sections.

Abstract

One of the hot topics in hadron physics is the study of the new exotic charmonium states and the determination of their internal structure. Another important topic is the search for effects of the magnetic field created in high energy nuclear collisions. In this note we show that we can use ultra-peripheral collisions to address both issues. We compute the cross section for the production of the $D^+ D^-$ molecular bound state in $\gamma-\gamma$ collisions. We also show how the magnetic field of the projectile can induce pion production in the target. Both processes have sizeable cross sections and their measurement would be very useful in the study of the topics mentioned above.