Chiral extrapolation and determination of low-energy constants from lattice data
Gerhard Ecker, Pere Masjuan, Helmut Neufeld
TL;DR
This paper introduces an analytic method for extrapolating lattice QCD data to physical meson masses, enabling precise determination of low-energy constants in chiral SU(3) theory.
Contribution
It presents a novel analytic approximation approach for chiral SU(3) amplitudes that facilitates the extraction of NNLO low-energy constants from lattice data.
Findings
Successfully tested with lattice data for F_K/F_pi ratio.
Allows controlled determination of NNLO low-energy constants.
Provides a practical tool for chiral extrapolation in lattice QCD.
Abstract
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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