论文标题
gluonic热点初始条件在重离子碰撞中
Gluonic Hot Spot Initial Conditions in Heavy-Ion Collisions
论文作者
论文摘要
重离子碰撞的初始条件是在许多不同的框架中计算的。当对流体动力学计算的输入进行初始条件进行建模时，已经确定了核和亚核结构内核子位置波动的重要性。但是，关于这些初始条件的难题仍然很出色，包括测量椭圆形$ v_ {2} $的近对等，三角形$ v_ {3} $在LHC的超中心0-1％PB+PB碰撞中的流量系数。最近，通过彩色玻璃冷凝物框架中的两点相关器融合了岩浆的计算，该计算掺入了岩浆热点，没有核子，与ATLAS实验测量的这些流量系数同时匹配，包括超中心的0-1％碰撞。我们的计算表明，岩浆初始条件通过完整的水动力声音模拟或一个核的热点解决另一个核的热点时，没有描述实验数据，如彩色玻璃冷凝物框架中所预测的那样。我们还探讨了替代性初始状况计算并讨论其含义。
The initial conditions in heavy-ion collisions are calculated in many different frameworks. The importance of nucleon position fluctuations within the nucleus and sub-nucleon structure has been established when modeling initial conditions for input to hydrodynamic calculations. However, there remain outstanding puzzles regarding these initial conditions, including the measurement of the near equivalence of the elliptical $v_{2}$ and triangular $v_{3}$ flow coefficients in ultra-central 0-1% Pb+Pb collisions at the LHC. Recently a calculation termed MAGMA incorporating gluonic hot spots via two-point correlators in the Color Glass Condensate framework, and no nucleons, provided a simultaneous match to these flow coefficients measured by the ATLAS experiment, including in ultra-central 0-1% collisions. Our calculations reveal that the MAGMA initial conditions do not describe the experimental data when run through full hydrodynamic SONIC simulations or when the hot spots from one nucleus resolve hot spots from the other nucleus, as predicted in the Color Glass Condensate framework. We also explore alternative initial condition calculations and discuss their implications.
