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arXiv 1109.6799hep-ph
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具有线性限制和温度依赖的夸克-反夸克势的手征对称性交叉

Chiral symmetry crossover with a linear confining and temperature dependent quark-antiquark potential

P. Bicudo

摘要:

最近,我们发展了一种数值方法,计算了不同流夸克质量m0下T=0处的手征对称性破缺,包括六种标准味u,d,s,c,b,t的流夸克质量。我们还从格点量子色动力学数据拟合了夸克-反夸克弦张力σ对温度T的依赖关系。我们现在利用sigma(T)进一步将手征不变量和禁闭夸克模型升级到有限温度T =/= 0。我们研究了有限T下夸克的质量,得到了T=Tc时相应的手征交叉。夸克质量临界曲线的形状与弦张力临界曲线相似,但不完全相同。对于最轻的夸克,夸克质量和手征凝聚在T=Tc时基本上消失,除了小的明确的手征对称性破缺mu和md。

英文摘要:

Recently we developed a numerical technique to compute chiral symmetry breaking at T=0 with different current quark masses m0, including the current quark masses of the six standard flavours u, d, s, c, b, t. We also fitted from Lattice QCD data the quark-antiquark string tension sigma dependence on temperature T. We now utilize sigma(T) to further upgrade the chiral invariant and confinement quark model to finite temperatures T =/= 0. We study the quark mass at finite T and obtain the corresponding chiral crossover at T=Tc. The quark mass critical curve has a shape similar, but not identical, to the string tension critical curve. In the case of the lightest quarks, the quark mass and the chiral condensate essentially vanish at T=Tc, except for the small explicit chiral symmetry breaking mu and md.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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