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Nuclear Physics A 729 (2003) 787808 www.elsevier.com/locate/npe

Summary: Nuclear Physics A 729 (2003) 787­808
Multi-photon exchange processes in ultraperipheral
relativistic heavy-ion collisions
Gerhard Baur a
, Kai Hencken b,
, Andreas Aste b
, Dirk Trautmann b
Spencer R. Klein c
a Forschungszentrum Jülich, 52425 Jülich, Germany
b Universität Basel, 4056 Basel, Switzerland
c Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
Received 16 July 2003; received in revised form 9 September 2003; accepted 11 September 2003
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


Source: Aste, Andreas - Institut für Physik, Universität Basel


Collections: Physics