Quarkonium dissociation in an anisotropic QGP

15th International Conference on Strangeness in Quark Matter

Thakur, Lata^1 ; Patra, Binoy Krishna^1

Department of Physics, Indian Institute of Technology Roorkee, Roorkee

247667, India^1

关键词: Anisotropic correction;    Anisotropic medium;    Dielectric functions;    Dissociation temperature;    Finite temperatures;    First order perturbation theory;    Quark-gluon plasma;    Real-time formalisms;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/668/1/012085/pdf
DOI  :  10.1088/1742-6596/668/1/012085

来源: IOP

【 摘 要 】

We have studied the properties of quarkonium states in an anisotropic quark-gluon plasma (QGP). We address the effects of non-perturbative confining force and momentum anisotropy on the heavy quark potential at finite temperature, which have been resolved by correcting both perturbative and non-perturbative terms of the Cornell potential through the dielectric function in terms of hard-loop resumed gluon propagator in real-time formalism. We have found that 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. In addition, the presence of anisotropy makes the real-part of the potential stronger but the imaginary-part is weakened slightly. The potential obtained in anisotropic medium is nonspherical. Therefore, we have used the first-order perturbation theory to estimate the shift in energy eigenvalues due to the small anisotropic correction to the energy eigenvalues from the spherically-symmetric part in isotropic medium and determine their dissociation temperatures. The presence of non-perturbative term in the potential results the quarkonia to dissociate at higher temperatures.