# $J-Ψ$ yield vs. multiplicity in proton-proton collisions at the LHC

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We address the question of understanding the production of $J-\psi$ particles regarding the global underlying event in proton-proton collisions. To do so, we propose to look at a new observable: the $J-\psi$ production as a function of the charged particles multiplicity of the event. We demonstrate the interest for an experimental measurement by varying the model of multiple interactions in the PYTHIA generator.

Autor: S. Porteboeuf; R. Granier de Cassagnac

Fuente: https://archive.org/