Speaker
Description
In this study, jets containing a J/$\psi$ among their constituents are identified, and the fragmentation function is defined as the longitudinal jet momentum fraction carried by the J/$\psi$ relative to the jet. Its measurement provides insight into quarkonium production, parton-shower dynamics, and their interplay.
The substantial upgrades of the ALICE detector in Run 3, in particular the implementation of continuous readout, provide a major increase in statistics for J/$\psi$ analyses at midrapidity. This significantly reduces uncertainties and enables fragmentation-function measurements with finer granularity and extended kinematic reach, offering valuable input for theoretical developments. Proton–proton collisions provide a clean environment and constitute a crucial baseline for heavy-ion and QGP studies, for which ALICE is optimized, where phenomena such as J/$\psi$ suppression and charm-quark recombination can be further investigated.
The observable will be presented separately for prompt and non-prompt J/$\psi$ mesons decaying into electron–positron pairs. Jets are reconstructed with the anti-k$_{\mathrm{T}}$ algorithm over a wide range of transverse momentum. The results will be compared with PYTHIA predictions and other state-of-the-art theoretical models.
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