Speaker
Description
Quarkonium production in high-energy lead-lead (Pb-Pb) collisions is a key tool for exploring both the perturbative and non-perturbative aspects of quantum chromodynamics (QCD) calculations.
Charmonia are bound states consisting of a charm and an anti-charm quark. Their production process can be divided into two stages: the creation of the heavy quarks and the formation of the bound state. The first stage occurs during initial hard parton-parton scatterings with large momentum transfer, which can be accurately described using perturbative QCD. The second stage, involving long-distance interactions and soft momentum scales, is a non-perturbative process. Studying the production of $\psi$(2S) in Pb-Pb collisions is important for understanding how quarkonium states are modified in the quark-gluon plasma. The $\psi$(2S) is more loosely bound than the J/$\psi$, and its amount of suppression in the medium can provide insight into the effects of the deconfined medium. The double ratio of $\psi$(2S) to J/$\psi$ in Pb-Pb relative to pp collisions helps to quantify the differential suppression of these two states, offering a clearer picture of the properties of the quark-gluon plasma and its impact on different charmonium states.
In this poster, we will present the analysis status of inclusive J/$\psi$ and $\psi$(2S) production at forward rapidity (2.5 $<$ $\mid$y$\mid$ $<$ 4), in Pb-Pb collisions at the center-of-mass energy per nucleon pair of $\sqrt{s_{NN}}$ = 5.36 TeV. The analysis is based on the data collected in 2023 by the upgraded ALICE detector during LHC Run 3, which provides higher statistics compared to previous data-taking periods. The $\psi$(2S)-to-J/$\psi$ double ratio will also be reported. The results will be compared to similar measurements from data collected during LHC Run 2.
| Category | Experiment |
|---|---|
| Collaboration (if applicable) | ALICE |
