论文标题
在夸克 - 糖浆等离子体中，重夸克 - 易夸镇对非扰动的增强
Non-perturbative Enhancement of Heavy Quark-Antiquark Pair Annihilation in the Quark-Gluon Plasma
论文作者
论文摘要
重量平衡的重颗粒的an灭是在夸克 - 胶状等离子体（QGP）中以及许多经典的暗物质情景中重新验证的夸克夸克在化学平衡中起着重要作用的重物。我们得出了一个散射幅度，该振幅从非偏见的散射$ t $ -matrix和Green的功能方面恢复了接近阈值的吸引力相互作用。派生的公式非常普遍，以至于它适用于两粒子歼灭的任意部分波过程，并能够结合an灭颗粒的有限宽度。在筛选的电势模型中，计算非扰动散射幅度，并确定了QGP中重型夸克式灭绝的Sommerfeld增强功能。
The annihilation of heavy particles close to thermal equilibrium, which plays a prominent role in the chemical equilibration of heavy quarks in the Quark-Gluon Plasma (QGP) as well as in many classic dark matter scenarios, is reexamined. We derive a scattering amplitude that resums near-threshold attractive interaction of the annihilating particles in terms of the non-relativistic scattering $T$-matrix and Green's function, thereby capturing the pertinent Sommerfeld enhancement from both nonperturbative scattering state and bound state solutions. The derived formula is of such generality that it applies to arbitrary partial wave processes of two-particle annihilation, and enables to incorporate finite widths of the annihilating particles. In a screened potential model, the non-perturbative scattering amplitude is computed and the Sommerfeld enhancement is identified for heavy quark-antiquark annihilation in the QGP.
