Prompt/Non-prompt J/ψ production in pp collisions at forward and midrapidity with ALICE

Sezione INFN, Bari, Italy

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Published online: 17 April 2026

Abstract

Quarkonium production in high-energy hadronic collisions is sensitive to both perturbative and non-perturbative aspects of quantum chromodynamics (QCD) calculations. The charmonium cross section can be split into prompt and non-prompt components, the first corresponding to directly produced charm-anticharm pairs, the second originating from the decay of beauty hadrons. Both components are relevant for the investigation of the properties of the quark-gluon plasma (QGP), with the latter allowing to study the mass dependence of heavy quarks in-medium energy-loss mechanism. In this contribution the recent measurement of prompt and non-prompt J/ψ carried out by the ALICE Collaboration in pp (|y| < 0.8) will be shown, including the newest results from LHC Run 3. Moreover, thanks to the installation of the new muon forward tracker (MFT), prompt/non-prompt charmonium separation is now possible in LHC Run 3 at forward rapidity (2.5 <y< 3.6). In pp collisions at √s = 13.6 TeV, the first results on the non-prompt J/ψ fraction with respect to prompt J/ψ at forward rapidity in ALICE are presented.