论文标题
各向异性热磁培养基中胶子的集体模式
Collective modes of gluons in an anisotropic thermo-magnetic medium
论文作者
论文摘要
我们使用硬热环（HTL）扰动理论研究了各向异性热培养基中胶子的集体模式。该介质的动量空间各向异性已通过广泛的$ romatschke-strickland'形式的分布函数纳入，而Quark Loop贡献产生的磁化效果已在最低的Landau级别近似中考虑了。我们考虑了两种特殊情况：（i）带有各向异性载体正交的球体各向异性与外部磁场正交，（ii）椭圆形各向异性，具有两个相互正交的矢量，描述了沿田间方向沿正交和正交方向沿着和正交的肛门。在两种情况下，极化张量的一般结构都是等效的，由六个独立的基础张量组成。我们发现，动量各向异性的引入使热磁体集体模式中的方位角依赖性。我们的研究表明，强大的背景磁场的存在可以显着降低不稳定模式的生长速率，这可能对磁化夸克 - 胶状等离子体的平衡具有重要意义。
We study the collective modes of gluons in an anisotropic thermal medium in the presence of a constant background magnetic field using the hard-thermal loop (HTL) perturbation theory. The momentum space anisotropy of the medium has been incorporated through the generalized $`$Romatschke-Strickland' form of the distribution function, whereas, the magnetic modification arising from the quark loop contribution has been taken into account in the lowest Landau level approximation. We consider two special cases: (i) a spheroidal anisotropy with the anisotropy vector orthogonal to the external magnetic field and (ii) an ellipsoidal anisotropy with two mutually orthogonal vectors describing aniostropies along and orthogonal to the field direction. The general structure of the polarization tensor in both cases are equivalent and consists of six independent basis tensors. We find that the introduction of momentum anisotropy ingrains azimuthal angular dependence in the thermo-magnetic collective modes. Our study suggests that the presence of a strong background magnetic field can significantly reduce the growth rate of the unstable modes which may have important implications in the equilibration of magnetized quark-gluon plasma.
