论文标题
在磁性热QCD培养基中拓宽重夸克
Momentum broadening of heavy quark in a magnetized thermal QCD medium
论文作者
论文摘要
重型夸克的各向异性动量扩散系数已在Langevin Dynamics框架内的静态极限之外进行了强磁化夸克 - 胶状等离子体计算。根据重夸克在磁场方向上运动的方向，在磁化热培养基中估计了重夸克的五动量扩散系数。具体来说，我们将注意力集中在满足条件的磁场的温度范围和强度上，$ \ it {i。} $ $ M \ gg \ gg \ sqrt {eb} \ gg t $，$ m $是大量的夸克质量。光夸克/古董遵循$ 1+1- $尺寸最低兰道水平（LLL）运动学，重型夸克动态不会直接受介质中的磁场影响。对扩散系数的热gluon贡献与$ t^3 $相比，而最低兰道州的光夸克对$ t | eb | $的贡献。此外，观察到，对于平行于磁场的重夸克运动的情况，扩散系数的横向横向横向横向和重量的夸克速度$（κ^{\ parallel} _ {ttt}）$与组成部分相比，与组成部分相比， $（κ^{\ parallel} _ {ll}）$，$，$，$κ^{\ PARALELLAL} _ {tt} \ggKκ^{\ Parallel} _ {ll} $。此外，对于垂直于磁场移动的重夸克的情况，可以看出横向磁场的扩散系数是主导的，即$κ^{\ perp} _ {lt}，κ^{\ perp} _ {\ perp} _ {
Anisotropic momentum diffusion coefficients of heavy quarks have been computed in a strongly magnetized quark-gluon plasma beyond the static limit within the framework of Langevin dynamics. Depending on the orientation of the motion of the heavy quark with respect to the direction of the magnetic field, five momentum diffusion coefficients of heavy quark have been estimated in the magnetized thermal medium. Specifically, we have focussed our attention to temperature range and strength of magnetic field satisfying the condition, $\it{i.e.}$ $M\gg\sqrt{eB}\gg T$, $M$ being the mass of heavy quark. The light quarks/antiquarks follow $1+1-$dimensional lowest Landau level (LLL) kinematics, and heavy quark dynamics are not directly affected by the magnetic field in the medium. The thermal gluon contribution to the diffusion coefficient is proportions to $T^3$, whereas, the contribution of light quarks in the lowest Landau state to the same is seen to be proportional to $T|eB|$. Furthermore, it is observed that for the case of heavy quark motion parallel to the magnetic field, the component of diffusion coefficient transverse both to the field and the heavy quark velocity $(κ^{\parallel}_{TT})$ turns out to be dominant as compared to the component longitudinal to both the field and motion $(κ^{\parallel}_{LL})$, $i.e.$, $κ^{\parallel}_{TT}\gg κ^{\parallel}_{LL}$. Further, for the case of heavy quark moving perpendicular to the magnetic field, it is seen that the diffusion coefficients transverse to the magnetic field are dominant, i.e., $κ^{\perp}_{LT}, κ^{\perp}_{TT}\gg κ^{\perp}_{TL}$.
