Nuclear modification of prompt and non-prompt J/Ψ production in p-Pb collisions at √S_NN = 5.02 TeV with ALICE

Dipartimento Interateneo di Fisica ‘M. Merlin’ and Sezione INFN, Bari, Italy

^* e-mail: giuseppe.trombetta@ba.infn.it

Published online: 14 November 2018

Abstract

Various Cold Nuclear Matter (CNM) effects, such as nuclear shadowing or partonic energy loss, can modify the production of J/Ψ in heavy-ion collisions with respect to what is measured in elementary colliding systems. The study of p-Pb collisions at the Large Hadron Collider (LHC) energy scale represents a crucial tool to assess the influence of Cold Nuclear Matter on J/Ψ production in order to achieve a more correct interpretation of Pb-Pb collision results. The ALICE detector at the LHC is capable of reconstructing J/Ψ mesons at central rapidity through their e⁺e^- decay channel down to zero transverse momentum (p_T), and has measured the fraction of J/Ψ produced from the decay of beauty-flavoured hadrons (non-prompt J/Ψ) in p-Pb collisions down to pT = 1:3 GeV/c. In this paper, the results obtained by ALICE from the measurement of the prompt and non-prompt J/Ψ yields at mid-rapidity in p-Pb collisions at √S_NN = 5.02 TeV will be discussed in comparison to different theoretical predictions including CNM effects.