Cargando…

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

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) improv...

Descripción completa

Detalles Bibliográficos
Autor principal: Fritzsch, Patrick
Lenguaje:eng
Publicado: 2018
Materias:
Acceso en línea:https://dx.doi.org/10.1007/JHEP06(2018)015
http://cds.cern.ch/record/2319225
_version_ 1780958407176486912
author Fritzsch, Patrick
author_facet Fritzsch, Patrick
author_sort Fritzsch, Patrick
collection CERN
description 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.
id cern-2319225
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2018
record_format invenio
spelling cern-23192252023-10-04T06:32:54Zdoi:10.1007/JHEP06(2018)015http://cds.cern.ch/record/2319225engFritzsch, PatrickMass-improvement of the vector current in three-flavor QCDhep-latParticle Physics - LatticeWe 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.arXiv:1805.07401CERN-TH-2018-119oai:cds.cern.ch:23192252018-05-18
spellingShingle hep-lat
Particle Physics - Lattice
Fritzsch, Patrick
Mass-improvement of the vector current in three-flavor QCD
title 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_short Mass-improvement of the vector current in three-flavor QCD
title_sort mass-improvement of the vector current in three-flavor qcd
topic hep-lat
Particle Physics - Lattice
url https://dx.doi.org/10.1007/JHEP06(2018)015
http://cds.cern.ch/record/2319225
work_keys_str_mv AT fritzschpatrick massimprovementofthevectorcurrentinthreeflavorqcd