Update on the physics of light pseudoscalar mesons

Details Update on the physics of light pseudoscalar mesons Update on the physics of light pseudoscalar mesons

2006-09-26

arxiv.org/abs/hep-lat/0609053v1

PoS LAT2006:163,2006

Physics

High Energy Physics

High Energy Physics - Lattice

7 pages, 4 figures. To be published in Proceedings of Science (Lattice 2006) 163 (2006)

Scientific paper

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 $\pi$ 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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