论文标题
跨界线上电荷和陌生波动的高阶累积物
Higher order cumulants of electric charge and strangeness fluctuations on the crossover line
论文作者
论文摘要
我们通过使用多达nnnlo taylor的扩展，介绍了小重骨化学电位的电荷分布的高阶累积分布的晶格QCD计算。这些累积物的比率是在伪关键线上评估手性转变的$ t_ {pc}（μ_b）$，并将其与Star和Phinix协作中的重离子碰撞实验中的相应测量结果进行了比较。我们证明这些比较对冻结参数产生了强烈的限制。此外，我们使用陌生的波动可观察物来计算跨界线上的比率$μ_s/μ_b$，并将其与$μ__s/μ_b$相比，从拟合中冻结，与奇怪的baryon收益率相比。
We present lattice QCD calculations of higher order cumulants of electric charge distributions for small baryon chemical potentials $μ_B$ by using up to NNNLO Taylor expansions. Ratios of these cumulants are evaluated on the pseudo-critical line, $T_{pc}(μ_B)$, of the chiral transition and compared to corresponding measurements in heavy ion collision experiments by the STAR and PHENIX Collaborations. We demonstrate that these comparisons give strong constraints on freeze-out parameters. Furthermore, we use strangeness fluctuation observables to compute the ratio $μ_S/μ_B$ on the crossover line and compare it to $μ_S/μ_B$ at freeze-out stemming from fits to strange baryon yields measured by the STAR Collaboration.
