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arXiv · nucl-ex/0108018

Ultra-peripheral collisions of relativistic heavy ions

S. Klein
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Abstract

We report the first observation of exclusive $ρ$ production in ultra-peripheral collisions at RHIC. The $ρ$ are produced electromagnetically at large impact parameters where no hadronic interactions occur. The produced $ρ$ have a small perpendicular momentum, consistent with production that is coherent on both the photon emitting and scattering nuclei. We observe both exclusive $ρ$ production, and $ρ$ production accompanied by electromagnetic dissociation of both nuclei. We discuss models of vector meson production and the correlation with nuclear breakup. We also observe $e^+e^-$ pair production in these ultra-peripheral collisions.

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S. Klein. 2001-08-16. Ultra-peripheral collisions of relativistic heavy ions. https://doi.org/10.1063/1.1469961

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