An exploratory study of heavy domain wall fermions on the lattice
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 effective 4d overlap operator to be exponentially local, independent of the quark mass. We determine a maximum bare heavy quark mass of amh?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?5.7GeV. We observe very mild a2 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.
1-24
Boyle, P.
a12661a4-a1da-4fdc-9207-db20087bfaba
Juttner, A.
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Krstic Marinkovic, M.
e3294394-a296-488c-816a-5c8111b381ec
Sanfilippo, F.
14276d98-365a-4c37-a808-f4e9aff31fdc
Spraggs, M.
5683c2e0-0323-44ea-ba21-ba0eaf269e8c
Tsang, J.T.
e4648385-cecf-4c02-b13e-c06312f16b12
April 2016
Boyle, P.
a12661a4-a1da-4fdc-9207-db20087bfaba
Juttner, A.
a90ff7c5-ae8f-4c8e-9679-b5a95b2a6247
Krstic Marinkovic, M.
e3294394-a296-488c-816a-5c8111b381ec
Sanfilippo, F.
14276d98-365a-4c37-a808-f4e9aff31fdc
Spraggs, M.
5683c2e0-0323-44ea-ba21-ba0eaf269e8c
Tsang, J.T.
e4648385-cecf-4c02-b13e-c06312f16b12
Boyle, P., Juttner, A., Krstic Marinkovic, M., Sanfilippo, F., Spraggs, M. and Tsang, J.T.
(2016)
An exploratory study of heavy domain wall fermions on the lattice.
Journal of High Energy Physics, 2016 (37), .
(doi:10.1007/JHEP04(2016)037).
Abstract
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 amh?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?5.7GeV. We observe very mild a2 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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Accepted/In Press date: 22 March 2016
e-pub ahead of print date: 6 April 2016
Published date: April 2016
Organisations:
Theoretical Partical Physics Group
Identifiers
Local EPrints ID: 393648
URI: http://eprints.soton.ac.uk/id/eprint/393648
PURE UUID: 0408035f-e291-4fe9-b7a3-d130cdb2f95c
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Date deposited: 29 Apr 2016 09:26
Last modified: 15 Mar 2024 03:20
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Author:
P. Boyle
Author:
M. Krstic Marinkovic
Author:
F. Sanfilippo
Author:
M. Spraggs
Author:
J.T. Tsang
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