Status of the MILC light pseudoscalar meson project

TL;DR

This paper reports on the progress of lattice QCD calculations of pi and K meson properties using improved staggered quarks, including new ensembles and enhanced statistics, to refine physical predictions.

Contribution

It provides updated results for meson decay constants, quark masses, and low energy constants with new lattice ensembles and increased statistical accuracy.

Findings

New lattice ensemble with 0.06 fm spacing and 0.2 m_s sea mass

Improved estimates of decay constants and quark masses

Enhanced statistical data at various lattice spacings

Abstract

We discuss the current status of our calculation of the physics of pi and K mesons using three dynamical flavors of improved staggered quarks. This year, we have a new ensemble with a lattice spacing of 0.06 fm and a light sea mass of 0.2 m_s, as well as significant increases in statistics at several coarser lattice spacings and/or heavier sea masses. Results for decay constants, quark masses, low energy constants, condensates, and V_{us} are presented.