eta-eta' mixing from U_L(3) x U_R(3) Chiral Perturbation Theory
arXiv:hep-ph/9710268 · doi:10.1016/S0370-2693(97)01507-4
Abstract
We obtain explicit expressions for the ηand η' masses and decay constants using U_L(3) x U_R(3) chiral perturbation theory at next-to-leading order in a combined expansion in p^2 and 1/Nc. A numerical fit of the parameters appearing to this order of the expansion is also discussed.
LateX, 10 pages