Lepton pair photoproduction in peripheral relativistic heavy-ion collisions

We study the lepton pair photoproduction in peripheral heavy-ion collisions based on the formalism in numerical results for the distributions of the transverse momentum, azimuthal angle and invariant mass for e+e- and mu+mu- pairs as functions of the impact parameter and other kinematic variables in Au + Au collisions. Our calculation incorporates the information on the transverse momentum and polarization of photons which is essential to describe the experimental data. We observe a broadening effect in the transverse momentum for lepton pairs with and without smear effects. We also observe a significant enhancement in the distribution of cos(2v) for mu+mu- pairs. Our results provide a baseline for future studies of other higher order corrections beyond Born approximation and medium effects in the lepton pair production.

Automated summary

In this study, we investigated the lepton pair photoproduction in peripheral heavy-ion collisions, focusing on the distribution of transverse momentum, azimuthal angle, and invariant mass for e+e- and mu+mu- pairs in Au + Au collisions. Our calculations included information on photon transverse momentum and polarization, leading to a better description of experimental data. The results indicated a broadening effect in transverse momentum for lepton pairs and a significant enhancement in the distribution of cos(2v) for mu+mu- pairs.