论文标题
从QCD临界点进行远程平衡搜索
Far-from-equilibrium search for the QCD critical point
论文作者
论文摘要
相对论重离子碰撞的初始条件可能远非平衡（即，剪切应力张量和大量压力的初始贡献很大），但是预计在很短的时间内，动力学会汇聚到定义流体动力行为的通用吸引子。到目前为止，对这种性质的研究仅考虑了LHC能量的理想化情况（高温$ t $和消失的Baryon化学势$μ_b= 0 $），但是，在这项工作中，我们首次研究了对实验性驱动的量子驱动的量子，以实现对RHIC的量子式Chromody time的实验驱动的搜索。我们发现，通往临界点的路径受到均衡初始条件的巨大影响，在这些条件下，粘性效应在QCD相图中导致巨大不同的$ \ left \ left \ {t，μ_b\ right \} $轨迹。我们将运动的流体动力方程与剪切和散装相结合，以有限的$μ_b$一起进行DNMR和现象学以色列 - 史密尔 - 斯图尔特运动方程，并讨论了它们对有限$μ_b$的潜在吸引子的影响，以及相应的$ \ weft \ weft \ weft \ weft \ {t，μ__b\ \ right \ right \ right \ right \} $ right \}。
Initial conditions for relativistic heavy-ion collisions may be far from equilibrium (i.e. there are large initial contributions from the shear stress tensor and bulk pressure) but it is expected that on very short time scales the dynamics converge to a universal attractor that defines hydrodynamic behavior. Thus far, studies of this nature have only considered an idealized situation at LHC energies (high temperatures $T$ and vanishing baryon chemical potential $μ_B=0$) but, in this work, we investigate for the first time how far-from-equilibrium effects may influence experimentally driven searches for the Quantum Chromodynamic critical point at RHIC. We find that the path to the critical point is heavily influenced by far from equilibrium initial conditions where viscous effects lead to dramatically different $\left\{T,μ_B\right\}$ trajectories through the QCD phase diagram. We compare hydrodynamic equations of motion with shear and bulk coupled together at finite $μ_B$ for both DNMR and phenomenological Israel-Stewart equations of motion and discuss their influence on potential attractors at finite $μ_B$ and their corresponding $\left\{T,μ_B\right\}$ trajectories.
