论文标题
重夸克与200 Agev au+au碰撞的QGP火球之间的相互作用
Interactions between heavy quarks and tilted QGP fireballs in 200 AGeV Au+Au collisions
论文作者
论文摘要
重型夸克可观察物用于探测初始能量密度分布，并违反了相对论重离子碰撞中产生的纵向增强不变性。使用改进的Langevin模型，与（3+1）维粘性的水动力模型结合在一起，我们研究了核修饰因子（$ r_ \ text {aa} $），定向流（$ v_1 $）和椭圆流（$ v_2 $）的含量（$ v_2 $），这些系数是沉重的e-ecteed Elector and rhriceed rhricic rhricic of rhricic of rhricic of rhricic rhricic of rhricic rhricic of rhricic of rhricic of rhricic of rhricic of。我们发现，反应平面中核物质的逆时针倾斜导致向后（正向）速度区域的正（负）浓度$ v_1 $，其幅度随着重夸克横向动量的增加而增加。还提出了不同角区域之间重型风味$ r_ \ text {aa} $的差异作为一种补充工具，以表征中等概况的不对称性。我们的模型结果与RHIC的当前可用数据一致，并提供了可以通过未来测量结果测试的预测。
Heavy quark observables are applied to probe the initial energy density distribution with violation of longitudinal boost invariance produced in relativistic heavy-ion collisions. Using an improved Langevin model coupled to a (3+1)-dimensional viscous hydrodynamic model, we study the nuclear modification factor ($R_\text{AA}$), directed flow ($v_1$) and elliptic flow ($v_2$) coefficients of heavy mesons and their decayed electrons at the RHIC energy. We find that the counter-clockwise tilt of the nuclear matter in the reaction plane results in a positive (negative) heavy flavor $v_1$ in the backward (forward) rapidity region, whose magnitude increases with the heavy quark transverse momentum. The difference in the heavy flavor $R_\text{AA}$ between different angular regions is also proposed as a complementary tool to characterize the asymmetry of the medium profile. Our model results are consistent with currently available data at RHIC and provide predictions that can be tested by future measurements.
