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arXiv 2111.04539hep-th
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(2+1)维Gross-Neveu模型动力学质量生成的复合算符方法

Composite operator approach to dynamical mass generation in the (2+1)-dimensional Gross-Neveu model

T. G. Khunjua, K. G. Klimenko, R. N. Zhokhov

摘要:

利用基于复合算符的Cornwall-Jackiw-Tomboulis(CJT)有效作用量$Γ(S)$的非微扰方法,研究了最简单的无质量(2 + 1)维Gross-Neveu模型的相结构.我们计算了裸耦合常数$G$的一阶$Γ(S)$,证明了$G\equiv G(Λ)$对截止参数$Λ$存在三种不同的特定依赖关系,并得到了每种情况下的有效作用量及其定态方程。这些方程的解对应于这样一个事实,即三种不同质量的费米子可以动态地出现,并且在模型中可以分别观察到三种不同的非平凡相。

英文摘要:

Using a nonperturbative approach based on the Cornwall-Jackiw-Tomboulis (CJT) effective action $Γ(S)$ for composite operators, the phase structure of the simplest massless (2 + 1)-dimensional Gross-Neveu model is investigated. We have calculated $Γ(S)$ in the first order of the bare coupling constant $G$ and have shown that there exist three different specific dependences of $G\equiv G(Λ)$ on the cutoff parameter $Λ$, and in each case the effective action and its stationarity equations have been obtained. The solutions of these equations correspond to the fact that three different masses of fermions can arise dynamically and, respectively, three different nontrivial phases can be observed in the model.

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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