TY - JOUR
T1 - Light pseudoscalar meson masses and decay constants from mixed action lattice QCD
AU - Aubin, Christopher
AU - Laiho, Jack
AU - Van De Water, Ruth S.
N1 - Publisher Copyright:
© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.
PY - 2008
Y1 - 2008
N2 - We calculate the light pseudoscalar decay constants, fπ and fK, and their ratio using domain wall valence quarks and 2+1 flavors of dynamical staggered quarks. Use of the MILC gauge configurations allows us to simulate at several sea quark masses and spatial volumes, and with two lattice spacings. We study how well our numerical lattice data for light decay constants and meson masses is described by next-to-leading order SU(3) mixed action chiral perturbation theory and explain our strategy for the chiral and continuum extrapolation. Combining our result for fK/ fπ with experimental measurements of pion and kaon leptonic decays allows a model-independent determination of |Vus|/|Vud|; we find a preliminary value of |Vus|/|Vud| = 0.2315(45)(7).
AB - We calculate the light pseudoscalar decay constants, fπ and fK, and their ratio using domain wall valence quarks and 2+1 flavors of dynamical staggered quarks. Use of the MILC gauge configurations allows us to simulate at several sea quark masses and spatial volumes, and with two lattice spacings. We study how well our numerical lattice data for light decay constants and meson masses is described by next-to-leading order SU(3) mixed action chiral perturbation theory and explain our strategy for the chiral and continuum extrapolation. Combining our result for fK/ fπ with experimental measurements of pion and kaon leptonic decays allows a model-independent determination of |Vus|/|Vud|; we find a preliminary value of |Vus|/|Vud| = 0.2315(45)(7).
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M3 - Conference Article
AN - SCOPUS:85055344960
SN - 1824-8039
VL - 66
JO - Proceedings of Science
JF - Proceedings of Science
T2 - 26th International Symposium on Lattice Field Theory, LATTICE 2008
Y2 - 14 July 2008 through 19 July 2008
ER -