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Radiative $\eta'$ decays, the topological susceptibility and the Witten-Veneziano mass formula
The formulae describing the radiative decays eta '( eta ) to gamma gamma in QCD beyond the chiral limit are derived. The modifications of the conventional PCAC formulae due to the gluonic contribution to the axial anomaly in the flavour singlet channel are precisely described. The decay constan...
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| Lenguaje: | eng |
| Publicado: |
2000
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| Acceso en línea: | https://dx.doi.org/10.1016/S0550-3213(99)00623-9 http://cds.cern.ch/record/440360 |