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An exploratory study of heavy domain wall fermions on the lattice

We report on an exploratory study of domain wall fermions (DWF) as a lattice regularisation for heavy quarks. Within the framework of quenched QCD with the tree-level improved Symanzik gauge action we identify the DWF parameters which minimise discretisation effects. We find the corresponding effect...

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Autores principales: Boyle, Peter, Juttner, Andreas, Marinkovic, Marina Krstic, Sanfilippo, Francesco, Spraggs, Matthew, Tsang, Justus Tobias
Lenguaje:eng
Publicado: 2016
Materias:
Acceso en línea:https://dx.doi.org/10.1007/JHEP04(2016)037
http://cds.cern.ch/record/2132119
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author Boyle, Peter
Juttner, Andreas
Marinkovic, Marina Krstic
Sanfilippo, Francesco
Spraggs, Matthew
Tsang, Justus Tobias
author_facet Boyle, Peter
Juttner, Andreas
Marinkovic, Marina Krstic
Sanfilippo, Francesco
Spraggs, Matthew
Tsang, Justus Tobias
author_sort Boyle, Peter
collection CERN
description We report on an exploratory study of domain wall fermions (DWF) as a lattice regularisation for heavy quarks. Within the framework of quenched QCD with the tree-level improved Symanzik gauge action we identify the DWF parameters which minimise discretisation effects. We find the corresponding effective 4$d$ overlap operator to be exponentially local, independent of the quark mass. We determine a maximum bare heavy quark mass of $am_h\approx 0.4$, below which the approximate chiral symmetry and O(a)-improvement of DWF are sustained. This threshold appears to be largely independent of the lattice spacing. Based on these findings, we carried out a detailed scaling study for the heavy-strange meson dispersion relation and decay constant on four ensembles with lattice spacings in the range $2.0-5.7\,\mathrm{GeV}$. We observe very mild $a^2$ scaling towards the continuum limit. Our findings establish a sound basis for heavy DWF in dynamical simulations of lattice QCD with relevance to Standard Model phenomenology.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2016
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spelling cern-21321192022-08-10T12:37:00Zdoi:10.1007/JHEP04(2016)037http://cds.cern.ch/record/2132119engBoyle, PeterJuttner, AndreasMarinkovic, Marina KrsticSanfilippo, FrancescoSpraggs, MatthewTsang, Justus TobiasAn exploratory study of heavy domain wall fermions on the latticeParticle Physics - LatticeParticle Physics - LatticeWe report on an exploratory study of domain wall fermions (DWF) as a lattice regularisation for heavy quarks. Within the framework of quenched QCD with the tree-level improved Symanzik gauge action we identify the DWF parameters which minimise discretisation effects. We find the corresponding effective 4$d$ overlap operator to be exponentially local, independent of the quark mass. We determine a maximum bare heavy quark mass of $am_h\approx 0.4$, below which the approximate chiral symmetry and O(a)-improvement of DWF are sustained. This threshold appears to be largely independent of the lattice spacing. Based on these findings, we carried out a detailed scaling study for the heavy-strange meson dispersion relation and decay constant on four ensembles with lattice spacings in the range $2.0-5.7\,\mathrm{GeV}$. We observe very mild $a^2$ scaling towards the continuum limit. Our findings establish a sound basis for heavy DWF in dynamical simulations of lattice QCD with relevance to Standard Model phenomenology.We report on an exploratory study of domain wall fermions (DWF) as a lattice regularisation for heavy quarks. Within the framework of quenched QCD with the tree-level improved Symanzik gauge action we identify the DWF parameters which minimise discretisation effects. We find the corresponding effective 4d overlap operator to be exponentially local, independent of the quark mass. We determine a maximum bare heavy quark mass of am$_{h}$ ≈ 0.4, below which the approximate chiral symmetry and O(a)-improvement of DWF are sustained. This threshold appears to be largely independent of the lattice spacing. Based on these findings, we carried out a detailed scaling study for the heavy-strange meson dispersion relation and decay constant on four ensembles with lattice spacings in the range 2.0-5.7 GeV. We observe very mild a$^{2}$ scaling towards the continuum limit. Our findings establish a sound basis for heavy DWF in dynamical simulations of lattice QCD with relevance to Standard Model phenomenology.We report on an exploratory study of domain wall fermions (DWF) as a lattice regularisation for heavy quarks. Within the framework of quenched QCD with the tree-level improved Symanzik gauge action we identify the DWF parameters which minimise discretisation effects. We find the corresponding effective 4$d$ overlap operator to be exponentially local, independent of the quark mass. We determine a maximum bare heavy quark mass of $am_h\approx 0.4$, below which the approximate chiral symmetry and O(a)-improvement of DWF are sustained. This threshold appears to be largely independent of the lattice spacing. Based on these findings, we carried out a detailed scaling study for the heavy-strange meson dispersion relation and decay constant on four ensembles with lattice spacings in the range $2.0-5.7\,\mathrm{GeV}$. We observe very mild $a^2$ scaling towards the continuum limit. Our findings establish a sound basis for heavy DWF in dynamical simulations of lattice QCD with relevance to Standard Model phenomenology.arXiv:1602.04118oai:cds.cern.ch:21321192016-02-12
spellingShingle Particle Physics - Lattice
Particle Physics - Lattice
Boyle, Peter
Juttner, Andreas
Marinkovic, Marina Krstic
Sanfilippo, Francesco
Spraggs, Matthew
Tsang, Justus Tobias
An exploratory study of heavy domain wall fermions on the lattice
title An exploratory study of heavy domain wall fermions on the lattice
title_full An exploratory study of heavy domain wall fermions on the lattice
title_fullStr An exploratory study of heavy domain wall fermions on the lattice
title_full_unstemmed An exploratory study of heavy domain wall fermions on the lattice
title_short An exploratory study of heavy domain wall fermions on the lattice
title_sort exploratory study of heavy domain wall fermions on the lattice
topic Particle Physics - Lattice
Particle Physics - Lattice
url https://dx.doi.org/10.1007/JHEP04(2016)037
http://cds.cern.ch/record/2132119
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