Multi-photon exchange processes in ultraperipheral relativistic heavy-ion collisions

被引：59

作者：

Baur, G

Hencken, K

Aste, A

Trautmann, D

Klein, SR

机构：

[1] Univ Basel, CH-4056 Basel, Switzerland

[2] Forschungszentrum Julich, D-52425 Julich, Germany

[3] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

来源：

NUCLEAR PHYSICS A | 2003年 / 729卷 / 2-4期

关键词：

POSITRON PAIR PRODUCTION; MULTIPLE ELECTROMAGNETIC-EXCITATION; VECTOR-MESON PRODUCTION; EIKONAL APPROXIMATION; CHARGED-PARTICLES; POLARIZED PHOTONS; FIELD; DISSOCIATION; SCATTERING; COLLIDERS;

D O I：

10.1016/j.nuclphysa.2003.09.006

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The very strong electromagnetic fields present in ultraperipheral relativistic heavy-ion collisions lead to important higher-order effects of the electromagnetic interaction. These multi-photon exchange processes are studied using perturbation theory and the sudden or Glauber approximation. In many important cases, the multi-photon amplitudes factorize into independent single-photon amplitudes. These amplitudes have a common impact parameter vector, which induces correlations between the amplitudes. Impact-parameter dependent equivalent-photon spectra for simultaneous excitation are calculated, as well as, impact-parameter dependent gammagamma-luminosities. Excitations, like the multi-phonon giant dipole resonances, vector meson production and multiple e(+)e(-)-pair production can be treated analytically in a bosonic model, analogous to the emission of soft photons in QED. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：787 / 808

页数：22

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