Light pseudoscalar meson masses and decay constants from mixed action lattice QCD

Christopher Aubin; John W Laiho; Ruth S. Van De Water

Light pseudoscalar meson masses and decay constants from mixed action lattice QCD

Christopher Aubin, John W Laiho, Ruth S. Van De Water

Research output: Contribution to journal › Conference article › peer-review

Abstract

We calculate the light pseudoscalar decay constants, f_π and f_K, 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 f_K/ f_π with experimental measurements of pion and kaon leptonic decays allows a model-independent determination of |V_us|/|V_ud|; we find a preliminary value of |V_us|/|V_ud| = 0.2315(45)(7).

Original language	English (US)
Journal	Proceedings of Science
Volume	66
State	Published - Jan 1 2008
Externally published	Yes
Event	26th International Symposium on Lattice Field Theory, LATTICE 2008 - Williamsburg, United States Duration: Jul 14 2008 → Jul 19 2008

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Cite this

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title = "Light pseudoscalar meson masses and decay constants from mixed action lattice QCD",

abstract = "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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year = "2008",

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note = "26th International Symposium on Lattice Field Theory, LATTICE 2008 ; Conference date: 14-07-2008 Through 19-07-2008",

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T1 - Light pseudoscalar meson masses and decay constants from mixed action lattice QCD

AU - Aubin, Christopher

AU - Laiho, John W

AU - Van De Water, Ruth S.

PY - 2008/1/1

Y1 - 2008/1/1

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

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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 -

Light pseudoscalar meson masses and decay constants from mixed action lattice QCD

Abstract

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