Results for light pseudoscalars from three-flavor simulations

C. Aubin; C. Bernard; C. DeTar; Steven Gottlieb; E. B. Gregory; Urs M. Heller; J. E. Hetrick; J. Osborn; R. L. Sugar; D. Toussaint

doi:10.1016/j.nuclphysbps.2004.11.174

Results for light pseudoscalars from three-flavor simulations

C. Aubin, C. Bernard, C. DeTar, Steven Gottlieb, E. B. Gregory, Urs M. Heller, J. E. Hetrick, J. Osborn, R. L. Sugar, D. Toussaint

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13 Scopus citations

Abstract

We compute pseudoscalar meson masses and decay constants in partially quenched QCD with three dynamical flavors of improved staggered quarks. Fitting the lattice data to staggered chiral perturbation theory (SχPT) forms and extrapolating in quark mass and lattice spacing, we find: f_π = 129.5 ± 0.9 ± 3.5 MeV, f_K = 156.6 ± 1.0 ± 3.6 MeV, and f_K/f_π = 1.210 (4) (13). The value for f_K/f_π implies V_us = 0.2219 (26). We also obtain m_u/m_d = 0.43(0) (1) (8), or, with more input on electromagnetic (EM) effects from the continuum, m_u/m_d = 0.41 (0) (1) (4). Using the one-loop perturbative mass renormalization [1], we determine m_u and m_d in the MS scheme.

Original language	English (US)
Pages (from-to)	231-233
Number of pages	3
Journal	Nuclear Physics B - Proceedings Supplements
Volume	140
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.nuclphysbps.2004.11.174
State	Published - Mar 2005
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Nuclear and High Energy Physics

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10.1016/j.nuclphysbps.2004.11.174

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title = "Results for light pseudoscalars from three-flavor simulations",

abstract = "We compute pseudoscalar meson masses and decay constants in partially quenched QCD with three dynamical flavors of improved staggered quarks. Fitting the lattice data to staggered chiral perturbation theory (SχPT) forms and extrapolating in quark mass and lattice spacing, we find: fπ = 129.5 ± 0.9 ± 3.5 MeV, fK = 156.6 ± 1.0 ± 3.6 MeV, and fK/fπ = 1.210 (4) (13). The value for fK/fπ implies Vus = 0.2219 (26). We also obtain mu/md = 0.43(0) (1) (8), or, with more input on electromagnetic (EM) effects from the continuum, mu/md = 0.41 (0) (1) (4). Using the one-loop perturbative mass renormalization [1], we determine mu and md in the MS scheme.",

author = "C. Aubin and C. Bernard and C. DeTar and Steven Gottlieb and Gregory, {E. B.} and Heller, {Urs M.} and Hetrick, {J. E.} and J. Osborn and Sugar, {R. L.} and D. Toussaint",

year = "2005",

month = mar,

doi = "10.1016/j.nuclphysbps.2004.11.174",

language = "English (US)",

volume = "140",

pages = "231--233",

journal = "Nuclear Physics B - Proceedings Supplements",

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TY - JOUR

T1 - Results for light pseudoscalars from three-flavor simulations

AU - Aubin, C.

AU - Bernard, C.

AU - DeTar, C.

AU - Gottlieb, Steven

AU - Gregory, E. B.

AU - Heller, Urs M.

AU - Hetrick, J. E.

AU - Osborn, J.

AU - Sugar, R. L.

AU - Toussaint, D.

PY - 2005/3

Y1 - 2005/3

N2 - We compute pseudoscalar meson masses and decay constants in partially quenched QCD with three dynamical flavors of improved staggered quarks. Fitting the lattice data to staggered chiral perturbation theory (SχPT) forms and extrapolating in quark mass and lattice spacing, we find: fπ = 129.5 ± 0.9 ± 3.5 MeV, fK = 156.6 ± 1.0 ± 3.6 MeV, and fK/fπ = 1.210 (4) (13). The value for fK/fπ implies Vus = 0.2219 (26). We also obtain mu/md = 0.43(0) (1) (8), or, with more input on electromagnetic (EM) effects from the continuum, mu/md = 0.41 (0) (1) (4). Using the one-loop perturbative mass renormalization [1], we determine mu and md in the MS scheme.

AB - We compute pseudoscalar meson masses and decay constants in partially quenched QCD with three dynamical flavors of improved staggered quarks. Fitting the lattice data to staggered chiral perturbation theory (SχPT) forms and extrapolating in quark mass and lattice spacing, we find: fπ = 129.5 ± 0.9 ± 3.5 MeV, fK = 156.6 ± 1.0 ± 3.6 MeV, and fK/fπ = 1.210 (4) (13). The value for fK/fπ implies Vus = 0.2219 (26). We also obtain mu/md = 0.43(0) (1) (8), or, with more input on electromagnetic (EM) effects from the continuum, mu/md = 0.41 (0) (1) (4). Using the one-loop perturbative mass renormalization [1], we determine mu and md in the MS scheme.

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U2 - 10.1016/j.nuclphysbps.2004.11.174

DO - 10.1016/j.nuclphysbps.2004.11.174

M3 - Article

AN - SCOPUS:12844268813

SN - 0920-5632

VL - 140

SP - 231

EP - 233

JO - Nuclear Physics B - Proceedings Supplements

JF - Nuclear Physics B - Proceedings Supplements

IS - SPEC. ISS.

ER -

Results for light pseudoscalars from three-flavor simulations

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