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arXiv 1602.09056hep-ph
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NJL模型与凝聚胶子的QCD模型之间的关系

The relation between the NJL model and QCD with condensed gluons

Hiroaki Kohyama

摘要:

我们试图在胶子动量在QCD标度μ g附近急剧凝聚的假设下,找到三味Nambu-Jona-Lasinio模型与QCD之间的联系。我们发现,四费米子和六费米子的有效相互作用G_4和G_6应分别用与μ_g^(-2)成正比的G_4和与μ_g^(-5)成正比的G_6来标度,这与所得到的有效拉格朗日量中的质量维数计数是一致的。然后我们研究了在有限温度和化学势下手征相变相图和临界点位置对μ g的依赖性。我们发现临界点的位置对胶子能量标度的大小有着敏感的影响。

英文摘要:

We try to find the relation between the three-flavor Nambu-Jona-Lasinio model and QCD based on the hypothesis that the gluon momenta are sharply condensed around the QCD scale, μ_g. We find that the effective four- and six-fermion interactions, G_4 and G_6, should be scaled by G_4 proportional to μ_g^(-2) and G_6 proportional to μ_g^(-5) being consistent with the mass dimension counting in the obtained effective Lagrangian. We then study the μ_g dependence on the phase diagram of the chiral phase transition at finite temperature and chemical potential and the location of the critical point. We find that the location of the critical point are sensitively affected by the value of the introduced gluon energy scale.

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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