论文标题
来自本地电荷保护的网络电荷分布的高阶累积物
Higher-order cumulants of net-charge distributions from local charge conservation
论文作者
论文摘要
在重型离子碰撞的研究中，保守量的波动被认为是核物质的辐射和党派阶段之间过渡的重要信号。在本文中，研究了局部电荷保护如何影响LHC能量处的净收税分布的高阶累积物。累积物的简单表达式是在粒子 - 抗粒子对的假设下得出的，即从速度几乎不相关的局部过程中产生粒子 - 抗细胞对。对于使用这些表达式的计算，只需要知道净收电荷分布的第二累积和颗粒数分布的低阶累积物，这些分布是可以直接在实验上测量的。有人认为，如果人们希望将敏感性与Net-Proton分布的累积物联系起来，则开发的模型提供了比常规的Skellam限制或基于蒙特卡洛模拟的模型更好的基线。
In studies of heavy-ion collisions, fluctuations of conserved quantities are considered as an important signal of the transition between the hadronic and partonic phases of nuclear matter. In this paper, it is investigated how the local charge conservation affects higher-order cumulants of net-charge distributions at LHC energies. Simple expressions for the cumulants are derived under the assumption that particle-antiparticle pairs are produced in local processes from sources that are nearly uncorrelated in rapidity. For calculations with these expressions, one needs to know only the second cumulant of net-charge distribution and low-order cumulants of particle number distribution, which are directly measurable experimentally. It is argued that if one wishes to relate susceptibilities with cumulants of net-proton distributions, the developed model provides a better baseline than the conventional Skellam limit or models based on monte-carlo simulations.
