J/ψ near Tc

We calculate the mass shift and thermal decay width of the J/psi near the QCD transition temperature T-c by imposing two independent constraints on these variables that can be obtained first by solving the Schrodinger equation and second from the QCD sum rule approach. While the real part of the potential is determined by comparing the QCD sum rule result for charmonium and the D meson to that from the potential model result, the imaginary potential is taken to be proportional to the perturbative form multiplied by a constant factor, which in turn can be determined by applying the two independent constraints. The result shows that the binding energy and the thermal width becomes similar in magnitude at around T = 1.09T(c), above which the sum rule analysis also becomes unstable, strongly suggesting that the J/psi will melt slightly above T-c. (C) 2021 The Author(s). Published by Elsevier B.V.

Automated summary

In this study, the mass shift and thermal decay width of J/psi near the QCD transition temperature T-c were calculated by imposing two independent constraints on these variables. The results show that the binding energy and thermal width become similar in magnitude at a specific temperature point, suggesting that J/psi may start to melt slightly above the transition temperature.