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

Guclu M. C., Kovankaya G., Yilmaz M.

PHYSICAL REVIEW A, vol.72, no.2, 2005 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 72 Issue: 2
  • Publication Date: 2005
  • Doi Number: 10.1103/physreva.72.022724
  • Journal Name: PHYSICAL REVIEW A
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED)
  • Istanbul Technical University Affiliated: Yes

Abstract

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.