Nambu--Jona-Lasinio model in a parallel electromagnetic field
Nuclear Theory
2018-03-19 v2 High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
We explore the features of the and chiral symmetry breaking of the Nambu--Jona-Lasinio model without the Kobayashi-Maskawa-'t Hooft determinant term in the presence of a parallel electromagnetic field. We show that the electromagnetic chiral anomaly can induce both finite neutral pion condensate and isospin-singlet pseudo-scalar condensate and thus modifies the chiral symmetry breaking pattern. In order to characterize the strength of the symmetry breaking, we evaluate the susceptibility associated with the charge. The result shows that the susceptibility contributed from the chiral anomaly is consistent with the behavior of the corresponding condensate. The spectra of the mesonic excitations are also studied.
Cite
@article{arxiv.1801.01682,
title = {Nambu--Jona-Lasinio model in a parallel electromagnetic field},
author = {Lingxiao Wang and Gaoqing Cao and Xu-Guang Huang and Pengfei Zhuang},
journal= {arXiv preprint arXiv:1801.01682},
year = {2018}
}