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

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.

6 pages, 4 figures

References in corpus (3)

• Evidences for two scales in hadrons
• Mutual boosting of the saturation scales in colliding nuclei
• Puzzles of J/Psi production off nuclei

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