有限温度下三夸克系统的重夸克自由能
Heavy quark free energies for three quark systems at finite temperature
摘要：
本文研究了有限温度下，在猝灭近似和2味QCD中，静态三夸克系统在单重态、八重态、十重态和平均色通道中的自由能。结果表明，在高温阶段，三夸克系统的单重态和十重态自由能可以用三个双夸克系统的自由能之和加上三个夸克的自能贡献来描述。在封闭低温相，我们发现了SU（3）纯规范理论中Y形通量管的证据，这在2味QCD中不太明显，因为弦破裂的开始。我们还比较了八重态和十重态自由能的短距离行为与相应色表象中的单静态夸克自由能。
英文摘要：
We study the free energy of static three quark systems in singlet, octet, decuplet and average color channels in the quenched approximation and in 2-flavor QCD at finite temperature. We show that in the high temperature phase singlet and decuplet free energies of three quark systems are well described by the sum of the free energies of three diquark systems plus self energy contributions of the three quarks. In the confining low temperature phase we find evidence for a Y-shaped flux tube in SU(3) pure gauge theory, which is less evident in 2-flavor QCD due to the onset of string breaking. We also compare the short distance behavior of octet and decuplet free energies to the free energies of single static quarks in the corresponding color representations.
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