Update on the physics of light pseudoscalar mesons

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

arXiv · hep-lat/0609053

Update on the physics of light pseudoscalar mesons

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

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Abstract

We present an update of the MILC investigation of the properties of light pseudoscalar mesons using three flavors of improved staggered quarks. Results are presented for the $π$ and $K$ leptonic decay constants, the CKM matrix element $V_{us}$, the up, down and strange quark masses, and the coefficients of the $O(p^4)$ chiral lagrangian. We have new data for lattice spacing $a \approx 0.15$ fm with several values of the light quark mass down to one-tenth the strange quark mass, higher statistics for $a \approx 0.09$ fm with the light quark mass equal to one-tenth the strange quark mass, and initial results for our smallest lattice spacing, $a \approx 0.06$ fm with light quark mass two-fifths of the strange quark mass.

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The MILC Collaboration, C. Bernard, C. DeTar, Steven Gottlieb, U. M. Heller, J. E. Hetrick, L. Levkova, J. Osborn, D. Renner, R. Sugar, D. Toussaint. 2006-09-26. Update on the physics of light pseudoscalar mesons. https://arxiv.org/abs/hep-lat/0609053

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