Heavy-quark potential in the Gribov-Zwanziger approach around the deconfinement phase transition

The interaction potential between a pair of heavy quarks is calculated with the resummed perturbation method in Gribov-Zwanziger (GZ) approach around the deconfinement phase transition. The resummed loop correction makes the potential complex. While the real part is suppressed by color screening and becomes short-ranged at high temperatures, the imaginary part is enhanced through decay processes in a hot medium and becomes comparable with the real part around the phase transition. The strong imaginary potential comes from the magnetic scale in the GZ approach and shows that both the color screening and decay processes play important roles in quarkonium dissociation in high-energy nuclear collisions.

Automated summary

The interaction potential between heavy quarks is calculated using the resummed perturbation method in the Gribov-Zwanziger approach around the deconfinement phase transition. The complex potential is a result of the resummed loop correction, where the real part is suppressed by color screening and becomes short-ranged at high temperatures, while the imaginary part is enhanced through decay processes in a hot medium and becomes comparable to the real part around the phase transition. The strong imaginary potential, originating from the magnetic scale in the GZ approach, shows the importance of both color screening and decay processes in quarkonium dissociation in high-energy nuclear collisions.