标题： QCD中有限温度下的通量管 显示英文标题

标题： Flux tubes in QCD at finite temperature

摘要： 我们展示了在有限温度下，由静态夸克-反夸克对产生的色电场的结果，在具有2+1动态交错费米子的格点QCD中，处于物理夸克质量下。 我们研究了随着温度通过并超过手征相变时该场的演化。 对于所有考虑的温度，我们发现了明显的色磁电流和纵向非微扰色电场的清晰证据，该场沿通量管几乎保持均匀。 在高温区域，通量管场的大小由一个有效弦张力决定，该张力随温度升高呈指数下降，而通量管宽度则根据逆温度定律减小。 我们的结果表明，在手征伪临界温度之后，夸克-反夸克系统可以用屏蔽的弦张力来表征。 显示英文摘要

摘要： We present results for the chromo-electric field generated by a static quark-antiquark pair at finite temperature, in lattice QCD with 2+1 dynamical staggered fermions at physical quark masses. We investigate the evolution of the field as the temperature increases through and beyond the chiral transition. For all the temperatures considered we find clear evidence of a chromo-magnetic current and of a longitudinal nonperturbative chromo-electric field that stays almost uniform along the flux tube. In the high-temperature region the magnitude of the flux-tube field is determined by an effective string tension that decreases exponentially as the temperature increases, while the flux-tube width decreases according to an inverse-temperature law. Our results suggest that beyond the chiral pseudocritical temperature the quark-antiquark system can be characterized by a screened string tension.