Production of exotic electromagnetic bound systems in ultra-peripheral heavy ion collisions with two-photon processes

TL;DR

This paper calculates the production of exotic electromagnetic bound systems like positronium, dimuonium, and ditauonium via photon-photon interactions in ultra-peripheral heavy ion collisions, showing experimental feasibility at RHIC and LHC.

Contribution

It introduces a method to estimate production rates of these bound systems in heavy ion collisions considering nuclear form factors.

Findings

Production rates are within experimental reach at RHIC and LHC.

Photon-photon interactions can produce exotic bound systems in ultra-peripheral collisions.

Feasibility studies support future experimental investigations.

Abstract

We calculate the production of exotic electromagnetic bound systems, which ia an consisting of a ($l^{+}l^{-}$) bound state system such as positronium, dimuonium, and ditauonium, by photon-photon interaction with the equivalent photon approximation in ultra-peripheral heavy ion collisions considering the nuclear form factor. The numerical results demonstrate that the experimental study of positronium, dimuonium, and ditauonium in ultra-peripheral collisions is feasible at Relativistic Heavy Ion Collider (RHIC) and Large Hadron Collider (LHC) energies.