SU(2) low energy quark effective couplings in weak external magnetic field

In this work corrections to the usual flavor SU(2) Nambu-Jona-Lasinio (NJL) coupling due to a weak external magnetic field are calculated by considering quark polarization in a (dressed) gluon exchange mechanism for quark interactions. The quark field is split into two components: one that condenses...

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Bibliographic Details
Published in:Physical review. D 2016-10, Vol.94 (7), Article 074030
Main Author: Braghin, Fábio L.
Format: Article
Language:English
Subjects:
Couplings
Magnetic fields
Quarks
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Summary:In this work corrections to the usual flavor SU(2) Nambu-Jona-Lasinio (NJL) coupling due to a weak external magnetic field are calculated by considering quark polarization in a (dressed) gluon exchange mechanism for quark interactions. The quark field is split into two components: one that condenses and another one that is a background field for interacting quarks, the former being integrated out. The resulting determinant is expanded for relatively large quark mass and small magnetic field (eB0/M*2)
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.94.074030