Low energy constituent quark and pion effective couplings to external electromagnetic field and a weak magnetic field

2018/04/23 by Braghin, Fábio L.
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.1804.08673

Abstract

In this work, a compilation of effective electromagnetic field couplings to pions and constituent quarks and their effective interactions derived previously, including corrections to the NJL model, is presented. The particular case of a weak external magnetic field along the z direction is considered shortly and effective coupling constants are redefined to incorporate the weak-B₀ dependence. They correspond to corrections to well known pion-constituent quark couplings and to the NJL and vector NJL effective couplings that break isospin and chiral symmetries.

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