论文标题
使用重子数量的累积量来测量声音速度
Measuring the speed of sound using cumulants of baryon number
论文作者
论文摘要
我们表明，可以使用BARYON数字分布的前三个累积物的值来计算声音的等温速度及其相对于Baryon数量密度的对数衍生物。我们讨论了该结果在重型离子碰撞实验中的应用，并解决了可能的挑战，包括由于巴里昂的数量保存，质子和重子累积物之间的差异以及有限数量统计量对实验和HADRONIC运输模拟中波动可观察到的影响。特别是，我们研究了使用有限数量的粒子在模拟中获得的无限，连续物质计算的数量与可观察到的数量之间的关系。
We show that the values of the first three cumulants of the baryon number distribution can be used to calculate the isothermal speed of sound and its logarithmic derivative with respect to the baryon number density. We discuss applications of this result to heavy-ion collision experiments and address possible challenges, including effects due to baryon number conservation, differences between proton and baryon cumulants, and the influence of finite number statistics on fluctuation observables in both experiment and hadronic transport simulations. In particular, we investigate the relation between quantities calculated in infinite, continuous matter and observables obtained in simulations using a finite number of particles.
