Logo
ScienceStack
Table of Contents
Fetching ...
Sign In

Status of the MILC light pseudoscalar meson project

C. Bernard, C. DeTar, Steven Gottlieb, U. M. Heller, J. E. Hetrick, L. Levkova, J. Osborn, D. Renner, R. Sugar, D. Toussaint

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.

Status of the MILC light pseudoscalar meson project

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.

Paper Structure

This paper contains 3 equations, 2 figures, 2 tables.

Figures (2)

  • Figure 1: Comparison of NNNLO fit to partially-quenched squared meson masses. For clarity only the lightest sea-quark ensemble for each lattice spacing is shown. html:<A name="ref-fig:masses">html:</A> LAB: fig:masses
  • Figure 2: Data for $m_\pi^2/(m_x+m_y)$ is plotted at left; while that for $f_\pi$ is plotted at right. This is the same fit as in Fig. 1. All sea-quark ensembles are represented, but only "pion" points ($m_x\!=\!m_y$) are shown. html:<A name="ref-fig:m-and-f">html:</A> LAB: fig:m-and-f