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Characterization of hadron production in γ−A photonuclear interactions of ultra-peripheral collisions

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Nucleus

On-line version ISSN 2075-5635

Abstract

CONSUEGRA RODRIGUEZ, S.; GUZMAN MARTINEZ, F.  and  ARREBATO VILLAR, D.Y.. Characterization of hadron production in γ−A photonuclear interactions of ultra-peripheral collisions. Nucleus [online]. 2018, n.64, pp. 10-14.  Epub May 24, 2019. ISSN 2075-5635.

A methodology for the simulation of ultra-peripheral collisions, specifically ultra-relativistic heavy ion 197Au-197Au and p-208Pb collisions, is developed. First, the fluxes of virtual photons as a function of the photon energy and the impact parameter are obtained using the Method of Weizsäcker-Williams. Then, the processes induced by photons in photon-hadron collisions γ+Au, γ+p and γ+Pb are simulated, neglecting the photon-photon contribution. The model is implemented in the code CRISP (Collaboration Rio-Sao Paulo), specifically designed for simulations of the nuclear environment. Cross-section, differential cross-section, multiplicity, invariant mass spectrum, angular distribution and p T distribution in 197Au-197Au and p-208Pb collisions are obtained, and a comparison with experimental data is accomplished in order to validate the model.

Keywords : collisions; nuclei; cross sections; photons; experimental data.

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