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arXiv 1409.3733hep-phcond-mat.str-elnucl-th
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通过与QCD临界点的软模耦合产生软夸克激发

Emergence of soft quark excitations by the coupling with a soft mode of the QCD critical point

Masakiyo Kitazawa, Teiji Kunihiro, Yukio Nemoto

摘要:

在夸克质量不为零的手征有效模型中,研究了手征相变临界点附近温度和密度不为零的夸克谱,并考虑了标量和赝标量密度涨落的影响.我们知道,与CP处的二阶跃迁有关的软模位于标量密度涨落的类空区域。我们发现软模对CP附近的夸克谱有显著的影响,导致准夸克峰的移动。本文还讨论了复合稳定π介子对CP附近夸克谱的影响。

英文摘要:

We study the quark spectrum at nonzero temperature and density near the critical point (CP) of the chiral phase transition incorporating effects of the scalar- and pseudoscalar-density fluctuations in a chiral effective model with a nonzero current quark mass. It is known that the soft mode associated with the second-order transition at the CP lies in the spacelike region of the scalar-density fluctuation. We find that the soft mode influences the quark spectrum significantly near the CP, resulting in the shift of the quasiquark peak. Effects of the composite stable pions on the quark spectrum near the CP are also discussed.

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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