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eta and eta' hadronic decays in U_L(3)xU_R(3) Chiral Perturbation Theory
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The decays eta/eta' -> pi pi pi and eta' -> eta pi pi are studied up to leading and next-to-leading order within the framework of U_L(3)xU_R(3) Chiral Perturbation Theory. The analysis incorporates important features of the eta-eta' system, such as the contribution of the glueball alphaG\~G due to the axial anomaly and eta_0/eta_8 mixing. One-loop corrections, which are third-order contributions according to the combined chiral and 1/Nc expansion, are not included. Reasonably good results are obtained in most cases.
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Cited by 1 Pith paper
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Study of $\eta^\prime \to \eta \pi\pi $ Decays in Large-$N_C$ Chiral Perturbation Theory
Including ππ final-state interactions in large-Nc ChPT improves agreement with η′ → η ππ data and yields Dalitz parameters a = -0.085(18)stat(4)syst, b = -0.081(10)stat(6)syst, d = -0.045(6)stat(8)syst.
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