Mass-improvement of the vector current in three-flavor QCD

Abstract We determine two improvement coefficients which are relevant to cancel mass-dependent cutoff effects in correlation functions with operator insertions of the non-singlet local QCD vector current. This determination is based on degenerate three-flavor QCD simulations of non-perturbatively O(...

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Main Author:	P. Fritzsch
Format:	Article
Language:	English
Published:	Springer 2018-06-01
Series:	Journal of High Energy Physics
Subjects:	Lattice QCD Lattice Quantum Field Theory Nonperturbative Effects
Online Access:	http://link.springer.com/article/10.1007/JHEP06(2018)015

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spelling	doaj-art-c25222b359a648f79ad1ee00780b49e62018-08-15T22:01:18ZengSpringerJournal of High Energy Physics1029-84792018-06-012018611610.1007/JHEP06(2018)015Mass-improvement of the vector current in three-flavor QCDP. Fritzsch0CERN, Theoretical Physics DepartmentAbstract We determine two improvement coefficients which are relevant to cancel mass-dependent cutoff effects in correlation functions with operator insertions of the non-singlet local QCD vector current. This determination is based on degenerate three-flavor QCD simulations of non-perturbatively O(a) improved Wilson fermions with tree-level improved gauge action. Employing a very robust strategy that has been pioneered in the quenched approximation leads to an accurate estimate of a counterterm cancelling dynamical quark cutoff effects linear in the trace of the quark mass matrix. To our knowledge this is the first time that such an effect has been determined systematically with large significance.http://link.springer.com/article/10.1007/JHEP06(2018)015Lattice QCDLattice Quantum Field TheoryNonperturbative Effects
institution	Open Data Bank
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language	English
format	Article
author	P. Fritzsch
spellingShingle	P. Fritzsch Mass-improvement of the vector current in three-flavor QCD Journal of High Energy Physics Lattice QCD Lattice Quantum Field Theory Nonperturbative Effects
author_facet	P. Fritzsch
author_sort	P. Fritzsch
title	Mass-improvement of the vector current in three-flavor QCD
title_short	Mass-improvement of the vector current in three-flavor QCD
title_full	Mass-improvement of the vector current in three-flavor QCD
title_fullStr	Mass-improvement of the vector current in three-flavor QCD
title_full_unstemmed	Mass-improvement of the vector current in three-flavor QCD
title_sort	mass-improvement of the vector current in three-flavor qcd
publisher	Springer
series	Journal of High Energy Physics
issn	1029-8479
publishDate	2018-06-01
description	Abstract We determine two improvement coefficients which are relevant to cancel mass-dependent cutoff effects in correlation functions with operator insertions of the non-singlet local QCD vector current. This determination is based on degenerate three-flavor QCD simulations of non-perturbatively O(a) improved Wilson fermions with tree-level improved gauge action. Employing a very robust strategy that has been pioneered in the quenched approximation leads to an accurate estimate of a counterterm cancelling dynamical quark cutoff effects linear in the trace of the quark mass matrix. To our knowledge this is the first time that such an effect has been determined systematically with large significance.
topic	Lattice QCD Lattice Quantum Field Theory Nonperturbative Effects
url	http://link.springer.com/article/10.1007/JHEP06(2018)015
_version_	1612704754475991040

Mass-improvement of the vector current in three-flavor QCD

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