Higher order fluctuations and correlations of conserved charges from lattice QCD
Higher order fluctuations and correlations of conserved charges from lattice QCD
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DOI：
10.1007/jhep10(2018)205
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发表时间：
2018-05
影响因子：
5.4
通讯作者：
S. Borsányi;Z. Fodor;J. Guenther;Sandor K. Katz;K. Szabó;A. Pásztor;I. Portillo;C. Ratti
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文献类型：
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作者：
S. Borsányi;Z. Fodor;J. Guenther;Sandor K. Katz;K. Szabó;A. Pásztor;I. Portillo;C. Ratti
在483× 12格点上，计算了具有物理质量的2+1+1夸克味系统中守恒电荷的几种对角和非对角涨落。在虚化学势下模拟，得到μB= 0处的高阶涨落作为低阶涨落的导数。从这些关联和波动，我们构建的净重子数累积量的比率作为温度和化学势的函数，满足奇异中性和质子/重子比的实验条件。我们的结果定性地解释了星星合作所测得的累积比的行为。
AbstractWe calculate several diagonal and non-diagonal fluctuations of conserved charges in a system of 2+1+1 quark flavors with physical masses, on a lattice with size 483× 12. Higher order fluctuations atμB= 0 are obtained as derivatives of the lower order ones, simulated at imaginary chemical potential. From these correlations and fluctuations we construct ratios of net-baryon number cumulants as functions of temperature and chemical potential, which satisfy the experimental conditions of strangeness neutrality and proton/baryon ratio. Our results qualitatively explain the behavior of the measured cumulant ratios by the STAR collaboration.