Charge symmetry breaking via ϱω mixing from model quark-gluon dynamics

The quark-loop contribution to the ϱ 0 ω mixing self-energy is calculated within a QCD-based model field theory in which the mesons are composite qq bound states and the dressed quark propagator, obtained from a model Dyson-Schwinger equation, is confining. In contrast to previous studies, the stre...

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Published inPhysics letters. B Vol. 335; no. 3; pp. 282 - 288
Main Authors Mitchell, K.L., Tandy, P.C., Roberts, C.D., Cahill, R.T.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 08.09.1994
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Summary:The quark-loop contribution to the ϱ 0 ω mixing self-energy is calculated within a QCD-based model field theory in which the mesons are composite qq bound states and the dressed quark propagator, obtained from a model Dyson-Schwinger equation, is confining. In contrast to previous studies, the strength and range of the meson- qq vertex functions are produced within the model, and the off-mass-shell mixing behaviour includes the contribution from the diagonal meson self-energies. Although the mass-shell mixing is very sensitive to the small isovector component of dynamical chiral symmetry breaking, the spacelike mixing still generates an insignificant charge symmetry breaking nuclear force.
ISSN:0370-2693
1873-2445
DOI:10.1016/0370-2693(94)90351-4