Coulomb effects on electromagnetic pair production in ultrarelativistic heavy-ion collisions
We calculate the asymptotic high-energy amplitude for electrons scattering at one ion, as well as at two colliding ions, by means of perturbation theory. We show that the interaction with one ion eikonalizes and that the interaction with two ions causally decouples. We are able to put previous results on perturbative grounds and propose further applications for the obtained rules for interactions on the light cone. We discuss the implications of the eikonal amplitude on the pair production probability in ultrarelativistic peripheral heavy-ion collisions. In this context the Weizsäcker-Williams method is shown to be exact in the ultrarelativistic limit, irrespective of the produced particles’ mass. A new equivalent single-photon distribution is derived, which correctly accounts for Coulomb distortions. The impact on single-photon induced processes is discussed.
| Author: | U. Eichmann, Joachim Reinhardt, Stefan Schramm, Walter Greiner |
|---|---|
| URN: | urn:nbn:de:hebis:30-30230 |
| Document Type: | Article |
| Language: | English |
| Date of Publication (online): | 14.07.2006 |
| Year of first Publication: | 1999 |
| Publishing Institution: | Univ.-Bibliothek Frankfurt am Main |
| Source: | Physical Review A 59(2), S. 1223-1237 (1999), ©1999 The American Physical Society, http://link.aps.org/abstract/PRA/v59/p1223 |
| HeBIS PPN: | 266054560 |
| Institutes: | Physik |
| Dewey Decimal Classification: | 530 Physik |
| PACS-Classification: | 11.80.-m Relativistic scattering theory |
| 12.20.-m Quantum electrodynamics | |
| 25.75.-q Relativistic heavy-ion collisions (collisions induced by light ions studied to calibrate relativistic heavy-ion collisions should be classified under both 25.75.-q and sections 13 or 25 appropriate to the light ions) | |
| Sammlungen: | Universitätspublikationen |
| Licence (German): |  Veröffentlichungsvertrag für Publikationen ohne Print on Demand |
