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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...
Autores principales: | , , , , , |
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Lenguaje: | eng |
Publicado: |
2016
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.1007/JHEP04(2016)037 http://cds.cern.ch/record/2132119 |
_version_ | 1780949830254723072 |
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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. |
id | cern-2132119 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2016 |
record_format | invenio |
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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