Dynamical symmetry restoration for a higher-derivative four-fermion model in an external electromagnetic field
High Energy Physics - Phenomenology
2017-08-23 v1 High Energy Physics - Theory
Abstract
A four-fermion model with additional higher-derivative terms is investigated in an external electromagnetic field. The effective potential in the leading order of large-N expansion is calculated in external constant magnetic and electric fields. It is shown that, in contrast to the former results concerning the universal character of "magnetic catalysis" in dynamical symmetry breaking, in the present higher-derivative model the magnetic field restores chiral symmetry broken initially on the tree level. Numerical results describing a second-order phase transition that accompanies the symmetry restoration at the quantum level are presented.
Keywords
Cite
@article{arxiv.hep-ph/9807368,
title = {Dynamical symmetry restoration for a higher-derivative four-fermion model in an external electromagnetic field},
author = {E. Elizalde and S. P. Gavrilov and S. D. Odintsov and Yu. I. Shil'nov},
journal= {arXiv preprint arXiv:hep-ph/9807368},
year = {2017}
}
Comments
LaTeX, 14 pages, 4 ps-figures