eta-eta' mixing from UL(3) x UR(3) Chiral Perturbation Theory
P. Herrera-Siklódy, J. I. Latorre, P. Pascual, J. Taron
Abstract
We obtain explicit expressions for the ηand η' masses and decay constants using UL(3) x UR(3) chiral perturbation theory at next-to-leading order in a combined expansion in p2 and 1/Nc. A numerical fit of the parameters appearing to this order of the expansion is also discussed.
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