标题： QCD等离子体中的价夸克：夸克数易感性和屏蔽效应 显示英文标题

标题： Valence quarks in the QCD plasma: quark number susceptibilities and screening

摘要： 我们研究了味禁闭QCD的夸克部分，在 1.5\le T/Tc\le 3 的范围内取连续极限，并使用两种不同的夸克格点离散化方法，从格点间距为 1/4T 到 1/14T 进行外推。 在这些温度下，每一格点间距处的味非对角磁化率，chi_{ud}/T^2，都与零相容，因此在连续极限下也是如此。 在连续极限下，即使在最高温度 T 下，轻夸克的磁化率也比理想气体的结果低约 10%，这与硬热圈预测一致，但略低于重整化微扰计算。 对于与奇异夸克相对应的质量范围，味对角磁化率显著较小。 我们估算出的 沃罗布耶夫斯基参数与RHIC和SPS的观测结果一致。 所有（局部）夸克双线性算符的屏蔽质量的连续极限非常接近理想气体的结果。 显示英文摘要

摘要： We have investigated the quark sector of quenched QCD for 1.5\le T/Tc\le3 in the continuum limit, using two different lattice discretisations of quarks and extrapolating from lattice spacings between 1/4T and 1/14T. At these temperatures, the flavour off-diagonal susceptibility, chi_{ud}/T^2, is compatible with zero at each lattice spacing, and hence also in the continuum limit. In the continuum limit, the light quark susceptibilities are about 10% less than the ideal gas results even at the highest T, in agreement with hard thermal loop predictions but marginally below a resummed perturbative computation. For the mass range appropriate to the strange quark, the flavour diagonal susceptibility is significantly smaller. Our estimate of the Wroblewski parameter is compatible with observations at RHIC and SPS. The continuum limit of screening masses in all (local) quark-bilinears is very close to the ideal gas results.