Coherent Electromagnetic Processes in Ultra-Peripheral Heavy-Ion Collisions
Abstract
We report measurements for coherent rho^0 production, AuAu->AuAu rho^0, and coherent rho^0 and e^+e^- pair production accompanied by mutual nuclear Coulomb excitation, AuAu->Au*Au* rho^0 and AuAuee, in ultra-peripheral relativistic gold-gold collisions (UPC). We discuss transverse momentum, mass, and rapidity distributions. The two photon-process of e^+e^- pair production is an important probe of strong field QED because of the large coupling Z*alpha=0.6. At sqrt{s}=200GeV, the e^+e^- production cross section agrees with lowest order QED calculations. The cross sections for coherent rho^0 production at sqrt{s}=130 and 200GeV are in agreement with theoretical predictions. The calculations for both, coherent e^+e^- and rho^0 production treat nuclear excitation as independent process.
Cite
@article{arxiv.nucl-ex/0307006,
title = {Coherent Electromagnetic Processes in Ultra-Peripheral Heavy-Ion Collisions},
author = {Falk Meissner and Vladimir B. Morozov},
journal= {arXiv preprint arXiv:nucl-ex/0307006},
year = {2019}
}
Comments
Presentation at the 'International Conference on the Structure and Interactions of the Photon-Photon 2003, Frascati, Italy'; 6 pages, 8 figures Corrected references