eta-eta-prime masses and mixing: A Large N(c) reappraisal
(2005) Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics — Vol. B616, p. 85-92 (2005)
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- (en) 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. Comment: 9 pages, 1 figure. Version 2: three new equations added, reference updated
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Gérard, J.-M., & Kou, E. (2005). eta-eta-prime masses and mixing: A Large N(c) reappraisal. Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, B616, 85-92. https://doi.org/10.1016/j.physletb.2005.04.057 (Original work published 2005)