Production of QED pairs at small impact parameter in relativistic heavy ion collisions

Details Production of QED pairs at small impact parameter in relativistic heavy ion collisions Production of QED pairs at small impact parameter in relativistic heavy ion collisions

2004-02-18

arxiv.org/abs/nucl-th/0402061v1

Phys.Rev. C69 (2004) 054902

Physics

Nuclear Physics

Nuclear Theory

15 pages, 8 figures

Scientific paper

10.1103/PhysRevC.69.054902

The STAR collaboration at RHIC is measuring the production of electron-positron pairs at small impact parameters, larger than but already close to the range, where the ions interact strongly with each other. We calculate the total cross section, as well as, differential distributions of the pair production process with the electromagnetic excitation of both ions in a semiclassical approach and within a lowest order QED calculation. We compare the distribution of electron and positron with the one coming from the cross section calculation without restriction on impact parameter. Finally we give an outlook of possible results at the LHC.

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