Coherent γγ and γA interactions in very peripheral collisions at relativistic ion colliders

2001/12/14 by G. Baur, Gerhard Baur, Kai Hencken +3 · 11 citations
Physics and Astronomy · #Cosmology and Gravitation Theories #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #hep-ph #nucl-th

paper · pdf · doi:10.1016/s0370-1573(01)00101-6

published as Phys.Rept.364:359-450,2002 · 125 pages, review article to appear in Physics Reports

arxiv created 2001/12/14 · openalex publication_date 2002/07/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

Due to coherence, there are strong electromagnetic fields of short duration in very peripheral collisions. They give rise to photon-photon and photon-nucleus collisions with a high flux up to an invariant mass region hitherto unexplored experimentally. After a general survey of the field equivalent photon numbers and photon-photon luminosities, especially for relativistic heavy ion collisions, are discussed. Special care needs to be taken to include the effects of the strong interaction and nuclear size in this case. Photon-photon and photon-hadron physics at various invariant mass scales are then discussed. The maximum equivalent photon energy in the lab-system (collider frame) are typically of the order of 3 GeV for RHIC and 100 GeV for LHC. Diffractive processes are an important background process. Lepton-pair, especially electron-positron pair production is copious. Due to the strong fields there will be new phenomena, like multiple e+e- pair production. The experimental techniques to select gamma-gamma-processes are finally discussed together with important background processes.

Citations

• Theoretical Summary Lecture for EPS HEP99
• Classical Electrodynamics

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