symmetry breaking quark interactions from vacuum polarization
arXiv:2405.00880 · doi:10.1140/epja/s10050-024-01390-8
Abstract
By considering the one loop background field method for a quark-antiquark interaction, mediated by one (non perturbative) gluon exchange, sixth order quark effective interactions are derived and investigated in the limit of zero momentum transfer for large quark and/or gluon effective masses. They extend fourth order quark interactions worked out in previous works of the author. These interactions break symmetry and may be either momentum independent or dependent. Part of these interactions vanish in the limit of massless quarks, and several other -- involving vector and/or axial quark currents -- survive. In the local limit of the resulting interactions, some phenomenological implications are presented, which correspond to corrections to the Nambu-Jona-Lasinio model. By means of the auxiliary field method, the local interactions give rise to three meson interactions whose values are compared to phenomenological values found in the literature. Contributions for meson-mixing parameters are calculated and compared to available results.
arXiv comment14 pages, one figure, revised manuscript. The original version v1 was split into two manuscripts, this is the first one. Accepted for publication
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