论文标题
重夸克在热和磁性的夸克gluon等离子体中移动的非扰动扩散
Non-perturbative diffusion of Heavy Quark moving in a hot and magnetised Quark Gluon Plasma
论文作者
论文摘要
重夸克（总部）是理解脱卷热QCD培养基的各种特征的出色探针，其中包括在重离子碰撞（HICS）中创建的光夸克和胶子。非中心HIC的强磁场可能会显着影响该介质中的HQ动力学。探索磁场对总部扰动和非扰动转运系数的影响是一项有趣的努力。这需要建立一个全面的理论框架，该框架适应非扰动量子Chromo动力学（NPQCD）描述以及扰动QCD（PQCD）。目前的工作提供了这样一种公式，其中在热和磁性QCD培养基中的Quarkonium电位被用作有效的Gluon繁殖器，以计算出在强且均匀的磁场的情况下，在热夸克Gluon等离子体（QGP）中，HQ和光的介质之间的弹性散射速率。已经计算出魅力夸克的扩散系数，以宽距离Yukawa电势（PQCD）以及两个符号速度平行且垂直于磁场的速度的远距离约束/非扰动电位（NPQCD）。在低温和低至魅力夸克的中间动力上，非扰动的贡献在扰动的方面占主导地位。随着魅力夸克的动量以及培养基的温度升高，PQCD开始在NPQCD贡献上获得增长，最终在较高的温度和魅力动量时盛行。
Heavy Quarks (HQs) serve as excellent probes to understand various characteristics of deconfined hot QCD medium, comprising light quarks and gluons, created in the Heavy Ion Collisions (HICs). Strong magnetic fields in non-central HICs may significantly affect HQ dynamics in this medium. Exploring the impact of the magnetic field on the perturbative and non-perturbative transport coefficients of HQ is an intriguing endeavor. This necessitates the development of a comprehensive theoretical framework accommodating the non-perturbative Quantum Chromo Dynamics(npQCD) description alongside perturbative QCD(pQCD). The present work provides such a formulation in which Quarkonium potential in the hot and magnetic QCD medium is implemented as the effective gluon propagator to calculate the rate of elastic scattering between HQ and the light partons inside a medium of hot Quark Gluon Plasma(QGP) in the presence of a strong but uniform magnetic field. Diffusion coefficients of a charm quark have been computed for a short-range Yukawa potential ( pQCD) as well as a long-range confining/non-perturbative potential (npQCD) for two cases in which the velocity of the charm quark is parallel and perpendicular to the magnetic field respectively. Non-perturbative contribution is seen to dominate over the perturbative one in the regime of low temperatures and low to intermediate momenta of charm quark. As the momentum of charm quark as well as the temperature of the medium increase pQCD starts to gain on the npQCD contribution, ultimately prevailing at higher temperatures and charm momenta.
