论文标题
放松的时间，使有限质量夸克/古夸公里的自旋与相对论重离子碰撞中的热涡度之间的对齐时间
Relaxation time for the alignment between the spin of a finite-mass quark/antiquark and the thermal vorticity in relativistic heavy-ion collisions
论文作者
论文摘要
我们研究有限质量夸克/古夸克的自旋与在有限温度下的热涡度的旋转所需的放松时间，并在相对论的重型离子碰撞的背景下。弛豫时间计算为总反应率的倒数，后者又从夸克/阿提夸克（Quark/Antiquark）自我能源的假想部分获得。我们通过顶点耦合夸克和热胶结对自旋和热涡度之间的相互作用进行建模，这些Quarks和热胶结与均匀的温度相比与全局角速度成正比，并且与温度成反比。我们使用对角速度进行不同碰撞能的逼真的估计值，并表明夸克质量的作用是减少与无质量夸克情况相比的放松时间。使用这些松弛时间，我们估计热涡度产生的内在夸克和古质公园极化。最后，我们指出的是，尽管前者比后者大，但在考虑到只有一部分夸克/反Quarks的事实时，仍然有可能了解Star Beam Energy扫描的最新结果。
We study the relaxation time required for the alignment between the spin of a finite-mass quark/antiquark and the thermal vorticity, at finite temperature and baryon chemical potential, in the context of relativistic heavy-ion collisions. The relaxation time is computed as the inverse of the total reaction rate that in turn is obtained from the imaginary part of the quark/antiquark self-energy. We model the interaction between spin and thermal vorticity within the medium by means of a vertex coupling quarks and thermal gluons that, for a uniform temperature, is proportional to the global angular velocity and inversely proportional to the temperature. We use realistic estimates for the angular velocities for different collision energies and show that the effect of the quark mass is to reduce the relaxation times as compared to the massless quark case. Using these relaxation times we estimate the intrinsic quark and antiquark polarizations produced by the thermal vorticity. We conclude by pointing out that, in spite of the former being larger than the latter, it is still possible to understand recent results from the STAR Beam Energy Scan when accounting for the fact that only a portion of quarks/antiquarks come from the denser and thus thermalized region in the collision.
