Imaginary part of the medium modified heavy quark potential

Abstract

We have calculated the dissociation of quarkonia through an imaginary potential which is obtained by correcting both the perturbative and non-perturbative terms of the potential at T=0 through the dielectric function in real-time formalism. The real-part of the potential becomes stronger and thus makes the quarkonia more bound whereas the (magnitude) imaginary-part too becomes larger and thus contribute more to the thermal width, compared to the medium-contribution of the Coulomb term alone. We have also extended our calculation to anisotropic medium, by calculating the leading anisotropic corrections to the propagators in Keldysh representation. The presence of anisotropy makes the real-part of the potential stronger but the imaginary-part is weakened slightly and the competition between them results in higher dissociation temperatures compared to isotropic medium.