论文标题
比较从晶格QCD到HRG模型计算的保守电荷波动
Comparing conserved charge fluctuations from lattice QCD to HRG model calculations
论文作者
论文摘要
我们以$ 2^{nd} $和$ 4^{th} $订购保守的电荷波动和相关性的订单累积量的晶格QCD计算的结果，并将其与各种HRG模型计算进行比较。我们表明，HRG和QCD计算之间的差异已经以第二阶累积物显示，接近（2+1） - 含有QCD的手性转变的伪临界温度，并在较高温度下迅速生长大。我们还表明，对于HRG模型计算，QCD的QCD结果得到了增强，这些计算仅基于粒子数据组表中列出的粒子作为三星级共振。这表明了其他奇怪的强子共鸣的贡献的重要性。我们此外认为，通过排除的体积（平均字段）模型或S-Matrix方法引入的其他（排斥性）相互作用，请勿以$ 2^{nd} $和$ 4^{th} $ ccd中计算出的$ 2^{nd} $的定量协议。基于HRG的方法无法描述在QCD的伪临界温度上或高于伪临界温度的强烈相互作用物质的热力学。
We present results from lattice QCD calculations for $2^{nd}$ and $4^{th}$ order cumulants of conserved charge fluctuations and correlations, and compare these with various HRG model calculations. We show that differences between HRG and QCD calculations already show up in the second order cumulants close to the pseudo-critical temperature for the chiral transition in (2+1)-flavor QCD and quickly grow large at higher temperatures. We also show that QCD results for strangeness fluctuations are enhanced over HRG model calculations which are based only on particles listed in the Particle Data Group tables as 3-star resonances. This suggests the importance of contributions from additional strange hadron resonances. We furthermore argue that additional (repulsive) interactions, introduced either through excluded volume (mean field) HRG models or the S-matrix approach, do not improve the quantitative agreement with $2^{nd}$ and $4^{th}$ order cumulants calculated in lattice QCD. HRG based approaches fail to describe the thermodynamics of strongly interacting matter at or shortly above the pseudo-critical temperature of QCD.
