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arXiv · 1308.3638

J/Psi in high-multiplicity pp collisions: lessons from pA

B. Z. Kopeliovich·H. J. Pirner·I. K. Potashnikova·K. Reygers·Ivan Schmidt
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Abstract

Gluons at small x in high-energy nuclei overlap in the longitudinal direction, so the nucleus acts as a single source of gluons, like higher Fock components in a single nucleon, which contribute to inelastic collisions with a high multiplicity of produced hadrons. This similarity helps to make a link between nuclear effects in pA and high-multiplicity pp collisions. Such a relation is well confirmed by data for the J/Psi production rate in high-multiplicity pp events measured recently in the ALICE experiment. Broadening of J/Psi transverse momentum is predicted for high-multiplicity pp collisions.

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B. Z. Kopeliovich, H. J. Pirner, I. K. Potashnikova, K. Reygers, Ivan Schmidt. 2013-08-22. J/Psi in high-multiplicity pp collisions: lessons from pA. https://doi.org/10.1103/physrevd.88.116002

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