Chiral extrapolation and determination of low-energy constants from lattice data

Gerhard Ecker; Helmut Neufeld; Pere Masjuan

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Chiral extrapolation and determination of low-energy constants from lattice data

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arxiv 1004.3422 v3 pith:O6ACA2TP submitted 2010-04-20 hep-ph hep-lat

Gerhard Ecker , Pere Masjuan , Helmut Neufeld This is my paper · ORCID

classification hep-phhep-lat

keywords constantsdatalatticechiraldeterminationextrapolationlow-energymeson

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We propose analytic approximations of chiral SU(3) amplitudes for the extrapolation of lattice data to the physical meson masses. The method allows the determination of NNLO low-energy constants in a controllable fashion. We test the approach with recent lattice data for the ratio F_K/F_pi of meson decay constants.

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