论文标题
记忆对夸克血浆中重夸克的能量损失和扩散的记忆影响
Memory effects on energy loss and diffusion of heavy quarks in the quark-gluon plasma
论文作者
论文摘要
我们研究了具有时间相关的热噪声的热夸克 - 胶状等离子体中重夸克的动力学，$η$。在这种情况下，据说$η$具有内存。我们使用一个差异分化的langevin方程，其中记忆通过热噪声和耗散力进入。我们假设噪声衰减的时间相关性在时间尺度上指数$τ$，我们将其视为免费参数。我们计算$τ\ neq 0 $的影响对重夸克的热化时间，对它们的动量扩展和核修饰因子的影响。我们发现，整体内存减慢了沉重的夸克的动量演变：实际上，横向动量扩大和$ r_ {aa} $的形成会因内存而减慢，而重夸克的热效时间变得更大。简要讨论对其他可观察物的潜在影响。
We study the dynamics of heavy quarks in a thermalized quark-gluon plasma with a time-correlated thermal noise, $η$. In this case it is said that $η$ has memory. We use an integro-differential Langevin equation in which the memory enters via the thermal noise and the dissipative force. We assume that the time correlations of the noise decay exponentially on a time scale, $τ$, that we treat as a free parameter. We compute the effects of $τ\neq 0$ on the thermalization time of the heavy quarks, on their momentum broadening and on the nuclear modification factor. We find that overall memory slows down the momentum evolution of heavy quarks: in fact, transverse momentum broadening and the formation of $R_{AA}$ are slowed down by memory and the thermalization time of the heavy quarks become larger. The potential impact on other observables is discussed briefly.
