Quark spectrum above but near critical temperature of chiral transition
Quark spectrum above but near critical temperature of chiral transition
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DOI：
10.1016/j.physletb.2005.11.076
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发表时间：
2005-10
影响因子：
4.4
通讯作者：
M. Kitazawa;T. Kunihiro;Y. Nemoto
中科院分区：
文献类型：
--
作者：
M. Kitazawa;T. Kunihiro;Y. Nemoto
我们探索了在接近但高于手性相变临界温度的有限温度下的夸克性质。研究了相变的前兆软模对夸克色散关系和谱函数的影响。发现具有三峰结构的准夸克和准反夸克出现了新的激发谱，它们不属于硬热环近似。我们证明了新的谱源于一个夸克（反夸克）和一个反夸克空穴（夸克空穴）之间的混合，这是由具有小而有限的激发能量的热激发软模式的准费米子的“共振散射”引起的。
We explore the quark properties at finite temperature near but above the critical temperature of the chiral phase transition. We investigate the effects of the precursory soft mode of the phase transition on the quark dispersion relation and the spectral function. It is found that there appear novel excitation spectra of quasi-quarks and quasi-anti-quarks with a three-peak structure, which are not attributed to the hard-thermal-loop approximation. We show that the new spectra originate from the mixing between a quark (anti-quark) and an anti-quark hole (quark hole) caused by a “resonant scattering” of the quasi-fermions with the thermally-excited soft mode which has a small but finite excitation energy.