期刊
PHYSICA SCRIPTA
卷 T99, 期 -, 页码 13-22出版社
IOP PUBLISHING LTD
DOI: 10.1238/Physica.Topical.099a00013
关键词
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eta-eta' mixing is discussed in the quark-flavor basis with the hypothesis that the decay constants follow the pattern of particle state mixing. On exploiting the divergences of the axial vector currents - which embody the axial vector anomaly - all mixing parameters are fixed to first order of flavor symmetry breaking. An alternative set of parameters is obtained from a phenomenological analysis. We also discuss mixing in the octet-singlet basis and show how the relevant mixing parameters are related to those in the quark-flavor basis. The dependence of the mixing parameters on the strength of the anomaly and the amount of flavor symmetry breaking is investigated. Finally. we present a few applications of the quark-flavor mixing scheme, such as radiative decays of vector mesons. the photon-pseudoscalar meson transition form factors. the coupling constants of eta and eta' to nucleons. and the isospin-singlet admixtures to the pi(0) meson.
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