Results from the MILC collaboration's SU(3) chiral perturbation theory analysis

TL;DR

This paper reports on the MILC collaboration's analysis of light pseudoscalar mesons using SU(3) chiral perturbation theory, incorporating new lattice data and NNLO logarithms to determine decay constants, quark masses, and low energy constants.

Contribution

It provides updated results from SU(3) chiral fits including new ensembles with finer lattices and lighter quark masses, and incorporates NNLO chiral logarithms for improved accuracy.

Findings

Decay constants and quark masses determined with high precision.

Low energy constants and condensates estimated in two- and three-flavor limits.

Enhanced understanding of pseudoscalar meson sector with new lattice data.

Abstract

We present the status of the MILC collaboration's analysis of the light pseudoscalar meson sector with SU(3) chiral fits. The analysis includes data from new ensembles with smaller lattice spacing, smaller light quark masses and lighter than physical strange quark masses. Our fits include the NNLO chiral logarithms. We present results for decay constants, quark masses, Gasser-Leutwyler low energy constants, and condensates in the two- and three-flavor chiral limits.