Eta-eta' masses and mixing: a large N_c reappraisal
classification
✦ hep-ph
hep-ex
keywords
eta-etalargemixinganglechiralcircconsistentcorrections
read the original abstract
We reconcile the 1/N_c expansion with the observed eta-eta' mass spectrum. The chiral corrections introduced for that purpose are natural and consistent with the octet-singlet mixing angle theta=-(22\pm 1)^{\circ} extracted from phenomenology in the large N_c limit.
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