Pion and Kaon Decay Constants: Lattice vs. Resonance Chiral Theory

Details Pion and Kaon Decay Constants: Lattice vs. Resonance Chiral Theory Pion and Kaon Decay Constants: Lattice vs. Resonance Chiral Theory

2004-08-05

arxiv.org/abs/hep-ph/0408080v1

Phys.Rev. D70 (2004) 094033

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 2 figures

Scientific paper

10.1103/PhysRevD.70.094033

The Lattice results for the pion and kaon decay constants are analysed within the Resonance Chiral Theory framework in the large NC 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 MS=1049 +- 25 MeV and the Chiral Perturbation Theory parameters at leading order in 1/NC.

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