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.