New Publication about quarkonium and hadrons

https://arxiv.org/abs/2012.11250

The European Physical Journal C volume 81, Article number: 305 (2021)

The primary purpose of experimental high-energy nuclear physics is to investigate the properties of the Quark-Gluon Plasma (QGP), a matter in local thermal equilibrium with quark and gluon degrees of freedom. Such a state of matter existed in the early Universe, and we can create it for a short while in heavy-ion collisions with high enough energy density.

One can use J/ψ meson (a bound state of c and anti-c quarks) to study the QGP properties. The partonic matter will screen the binding potential of c and anti-c quarks, which would cause a relative suppression of J/ψ production in heavy-ion reactions compared to nucleon-nucleon collisions. The same argument applies to other members of the charmonium and bottomonium families. Moreover, the suppression of a given state depends on the energy density (hence temperature) of the partonic matter. However, other effects can destroy charmonium or bottomonium mesons, such as interactions with hadrons in the last stage of the reaction (in the so-called hadronic phase).

We present a method for the measurement of parameters of elastic and inelastic interactions of charmonium with hadrons. This technique uses femtoscopic analysis of charmonium-hadron correlation at low relative momentum and the Lednicky-Lyuboshitz analytical model to extract the interaction parameters. We argue that such a study is already feasible in the LHCb experiment at the LHC, and we discuss the prospects for studies in STAR at RHIC and other experiments at the LHC.