SMuK 2023 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 54: AI Topical Day – Heavy-Ion Collisions and QCD Phases XI (joint session HK/AKPIK)

HK 54.5: Vortrag

Donnerstag, 23. März 2023, 15:00–15:15, HSZ/0105

Full beauty-hadron reconstruction with J/ψ: feasibility study for Run 3 with ALICE — •Guillaume Taillepied for the ALICE Germany collaboration — GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany

The study of the production of hidden and open heavy-flavour hadrons in proton-proton (pp) collisions provides an essential test of quantum chromodynamics, involving both the perturbative and non-perturbative regimes. The J/ψ meson allows to study both the charm sector, via the measurement of prompt J/ψ, and the beauty sector through the measurement of the non-prompt component, coming from the decay of beauty hadrons. With the recent upgrades of the ALICE apparatus, the full reconstruction of beauty hadrons in exclusive decay channels containing non-prompt J/ψ mesons is now possible, providing a new way to study beauty physics in hadronic collisions.

In this talk, a feasibility study of the B⁺ → J/ψ K⁺, J/ψ → e⁺e⁻ process in pp collisions at √s = 13.6 TeV with ALICE will be presented. The analysis makes use of the KFParticle package for a precise reconstruction of the B⁺ and non-prompt J/ψ decay chain. The package also provides important information for the training of a machine learning model, increasing the signal selection efficiency and signal-over-background ratio. Discussions on the perspectives in lead-lead collisions for Run 3, based on the results of this feasibility study, will be shown.