Coulomb corrections in the lepton-pair production in ultrarelativistic nuclear collisions

Guclu M., Kovankaya G., Yilmaz M.

PHYSICAL REVIEW A, cilt.72, sa.2, 2005 (SCI İndekslerine Giren Dergi) identifier identifier


We solve the perturbative electron-positron pair production exactly by calculating the second-order Feynman diagrams. We compare our result with Born methods that include Coulomb corrections. We find that a small-momentum approximation is not adequate to obtain exact Coulomb corrections and higher-order terms should also be included. We also compare the impact parameter dependence cross sections.