Simple symmetry breaking in a chiral SU(4) × SU(4) model of pseudoscalar mesons
- 1 October 1977
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 16 (7), 2304-2312
- https://doi.org/10.1103/physrevd.16.2304
Abstract
We calculate the effects of simple symmetry breaking on the mass spectrum, neutral isoscalar mixing angles, and decays of pseudoscalar mesons using a chiral SU(4) nonlinear model to describe the mesons. We find that in addition to quark-mass-type terms, a simple U(1)-breaking term will induce a reasonable isoscalar mass spectrum, give a low value for the decay, and is the dominant contribution to the (paracharmonium) decay into three isoscalars. We also calculate the effects of symmetry breaking on hadronic currents and thus on the weak decays of new mesons.
Keywords
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