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arXiv 1809.05545hep-ph
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任意时空维的超强耦合NJL模型

Super-Strong Coupling NJL model in arbitrary space-time dimensions

Aftab Ahmad, Angelo Martínez, Alfredo Raya

摘要:

我们研究了任意时空维Nambu-Jona-Lasinio模型中手征对称性破缺的问题,通过将能隙方程写成离散动力学系统的形式,并以耦合常数为控制参数,采用迭代的方法.当一个非平凡解从平凡解分叉并成为吸引子时,我们得到了手征对称性破缺的临界耦合。通过进一步增加耦合常数的值,我们观察到第二个分岔,在那里动力学解不再是吸引子,并且观察在所有时空维度都成立。在超强耦合区,系统变得混沌。

英文摘要:

We study chiral symmetry breaking in the Nambu--Jona-Lasinio model regularized in proper-time in arbitrary space-time dimensions through an iterative procedure by writing the gap equation in the form of a discrete dynamical system with the coupling constant as the control parameter. Expectedly, we obtain the critical coupling for chiral symmetry breaking when a nontrivial solution bifurcates away from the trivial one and becomes an attractor. By increasing further the value of the coupling constant, we observe a second bifurcation where the dynamical solution is no longer an attractor, and observation that holds true in all space-time dimensions. In the super-strong coupling regime, the system becomes chaotic.

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