Speaker
Description
In the earliest and hottest phase of ultra-relativistic collisions between heavy nuclei, a state of matter known as the Quark–Gluon Plasma (QGP) is expected to form, in which quarks and gluons, normally confined within hadrons, become deconfined. Quarkonium states provide sensitive probes of the production mechanisms and properties of the QGP. While this medium is predominantly produced in heavy-ion collisions such as Pb–Pb, measurements in smaller systems are essential to understand the underlying particle-production mechanisms. Proton–oxygen (pO) collisions studied at the LHC offer an opportunity to investigate the transition between cold and hot nuclear matter effects, including modifications of nuclear parton distribution functions, initial-state parton energy loss, nuclear absorption, and non-linear effects associated with gluon saturation, as described within the Color Glass Condensate framework. These measurements provide a baseline for interpreting QGP-related effects and a test ground for theoretical models.
This poster presents the analysis of inclusive $J/\psi$ production at midrapidity ($|y| < 0.9$) in pO collisions at $\sqrt{s} = 9.62~\mathrm{TeV}$. The charmonium states are reconstructed via the dielectron decay channel using the ALICE central barrel detectors.
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