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With sufficiently light up and down quarks the isovector ($a_0$) and isosinglet ($f_0$) scalar meson propagators are dominated at large distance by two-meson states.
Stochastic estimation with z(2) noise
Shao-Jing Dong and Keh-Fei Liu · 1994
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Partial flavor symmetry restoration for chiral staggered fermions
Weon-Jong Lee and Stephen R. Sharpe · 1999
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Partially quenched chiral perturbation theory and the replica method
P. H. Damgaard and K. Splittorff · 2000
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The qcd spectrum with three quark flavors
Claude W. Bernard et al · 2001
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Chiral loops and ghost states in the quenched scalar propagator
William A. Bardeen, A. Duncan, E. Eichten, Nathan Isgur, and H. Thacker · 2002
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Pion and kaon masses in staggered chiral perturbation theory
C. Aubin and C. Bernard · 2003
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Pseudoscalar decay constants in staggered chiral perturbation theory
C. Aubin and C. Bernard · 2003
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Staggered versus overlap fermions: A study in the schwinger model with n(f) = 0,1,2
Stephan Durr and Christian Hoelbling · 2004
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The index theorem and universality properties of the low- lying eigenvalues of improved staggered quarks
E. Follana, A. Hart, and C. T. H. Davies · 2004
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Staggered eigenvalue mimicry
Stephan Durr, Christian Hoelbling, and Urs Wenger · 2004
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Light pseudoscalar decay constants, quark masses, and low energy constants from three-flavor lattice qcd
C. Aubin et al · 2004
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Topological susceptibility in staggered fermion chiral perturbation theory
Brian Billeter, Carleton DeTar, and James Osborn · 2004
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Light hadrons with improved staggered quarks: Approaching the continuum limit
C. Aubin et al · 2004
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Staggered chiral perturbation theory
C. Aubin and C. Bernard · 2004
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Scaling tests with dynamical overlap and rooted staggered fermions
Stephan Durr and Christian Hoelbling · 2005
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Rooted staggered fermions: Good, bad or ugly?
Stephen R. Sharpe · 2006
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The locality of the fourth root of staggered fermion determinant in the interacting case
C. Bernard et al · 2006
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Scalar glueball and meson spectroscopy in unquenched lattice qcd with improved staggered quarks
Eric B. Gregory, Alan C. Irving, Craig C. McNeile, Steven Miller, and Zbyszek Sroczynski · 2006
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Effects of partial quenching and staggered fermions on the scalar correlator
Sasa Prelovsek · 2006
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Effects of staggered fermions and mixed actions on the scalar correlator
S. Prelovsek · 2006
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Renormalization-group analysis of the validity of staggered-fermion qcd with the fourth-root recipe
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The low-lying dirac spectrum of staggered quarks
E. Follana, A. Hart, C. T. H. Davies, and Q. Mason · 2005
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Observations on staggered fermions at non-zero lattice spacing
Claude Bernard, Maarten Golterman, and Yigal Shamir · 2006
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Staggered chiral perturbation theory and the fourth-root trick
C. Bernard · 2006
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Yigal Shamir · 2007
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Regularizing qcd with staggered fermions and the fourth root trick
Claude Bernard, Maarten Golterman, and Yigal Shamir · 2007
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Update on the physics of light pseudoscalar mesons
C. Bernard et al · 2007
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