Pion and Kaon Decay Constants : Lattice vs . Resonance Chiral Theory
نویسنده
چکیده
The Lattice results for the pion and kaon decay constants are analysed within the Resonance Chiral Theory framework in the large N C limit. The approximately linear behaviour of the observable at large light-quark mass is explained through the interaction with the lightest multiplet of scalar resonances. The analysis of the Lattice results allows to obtain the resonance mass M S = 1049 ± 25 MeV and the Chiral Perturbation Theory parameters at leading order in 1/N C .
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