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28 March 2024
 
  » arxiv » hep-ph/0201044

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Mixing of Pseudoscalar Mesons
Th. Feldmann ; P. Kroll ;
Date 8 Dec 2001
Journal Phys.Scripta T99 (2002) 13-22
Subject hep-ph nucl-ex nucl-th
AffiliationRWTH Aachen, Germany), and P. Kroll (Univ. Wuppertal, Germany
AbstractEta-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.
Source arXiv, hep-ph/0201044
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