Properties of charmonia in a hot equilibrated medium

Abstract

We investigate the properties of charmonia in a thermal medium, showing that with increasing temperature the decay widths of these mesons behave in a non-trivial way. Our analysis is based on a potential model with interaction potential extracted from thermal lattice QCD calculations of the free-energy of a static quark-antiquark pair. We find that in the crossover region some decay widths are extremely enhanced, which might be interpreted as a signature of the transition from hadronic matter to the deconfined phase. In particular, at temperatures $T\sim T_c$ the decay widths of the $J/\Psi$ that depend on the value of the wave function at the origin are enhanced with respect to the values in vacuum by about a factor 2. In the same temperature range the decay width of the process ${\chi }_{cJ}\to J/\Psi +\gamma$ is enhanced by approximately a factor 6 with respect to the value in vacuum. At higher temperatures the charmonia states dissociate and the widths of both decay processes become vanishing small.

arXiv commentminor changes, references added, almost matches published version

References in corpus (26)

• Real-time static potential in hot QCD
• $J/\psi$ and ${\eta }_c$ in the Deconfined Plasma from Lattice QCD
• Charmonium
• Static quark-antiquark pairs at finite temperature
• Behavior of Charmonium Systems after Deconfinement
• Thermal Dileptons at LHC
• Heavy-Quark Kinetics in the QGP at LHC
• Heavy Ion Collisions at the LHC - Last Call for Predictions
• Colour Deconfinement and Quarkonium Binding
• Towards a Theory of Binary Bound States in the Quark-Gluon Plasma
• Nonperturbative Heavy-Quark Diffusion in the Quark-Gluon Plasma
• Real and imaginary-time $Q\bar{Q}$ correlators in a thermal medium
• Color Screening Melts Quarkonium
• Heavy Quarkonia in Quark-Gluon Plasma
• Charmonium at high temperature in two-flavor QCD
• Rethinking the Properties of the Quark-Gluon Plasma at $T\sim T_c$
• A Model of Charmonium Absorption by Light Mesons
• Quarkonia Correlators Above Deconfinement
• Non-relativistic bound states at finite temperature (I): the hydrogen atom
• T-Matrix Approach to Quarkonium Correlation Functions in the QGP
• Heavy Quark Interactions in Finite Temperature QCD
• Hadronic Modes and Quark Properties in the Quark-Gluon Plasma
• Doubly heavy baryons in a Salpeter model with AdS/QCD inspired potential
• Quarkonia and Quark Drip Lines in Quark-Gluon Plasma
• η_b and η_c radiative decays in the Salpeter model with the AdS/QCD inspired potential
• Charmonium at finite temperature

Cited by in corpus (2)

• Charmonium in the vector channel at finite temperature from QCD sum rules
• A Novel Mechanism for $J/\psi$ Disintegration in Relativistic Heavy Ion Collisions