Heavy-strange meson decay constants in the continuum limit of quenched QCD
Heavy-strange meson decay constants in the continuum limit of quenched QCD
We improve a previous quenched result for heavy-light pseudoscalar meson decay constants with the light quark taken to be the strange quark. A finer lattice resolution (a ~ 0.05 fm) in the continuum limit extrapolation of the data computed in the static approximation is included. We also give further details concerning the techniques used in order to keep the statistical and systematic errors at large lattice sizes L/a under control. Our final result, obtained by combining these data with determinations of the decay constant for pseudoscalar mesons around the Ds, follows nicely the qualitative expectation of the 1/m-expansion with a (relative) 1/m-term of about -0.5GeV/mPS. At the physical b-quark mass we obtain FBs = 193(7)MeV, where all errors apart from the quenched approximation are included.
nonperturbative effects, b-physics, lattice QCD, heavy quarks physics
1-28
Morte, Michele Della
c950f6c4-6ec9-40ac-86f0-eef29ac2ec09
Dürr, Stephan
3c3b7060-a99b-4a36-a279-04ba46dd93e5
Guazzini, Damiano
1715b8d1-b547-4938-b590-7ffc7eed747c
Sommer, Rainer
1b793a87-4321-4602-b30c-d5157c4d02a2
Heitger, Jochen
e42a735a-3069-4e79-ad97-6288831cfa5f
Jüttner, Andreas
a90ff7c5-ae8f-4c8e-9679-b5a95b2a6247
20 February 2008
Morte, Michele Della
c950f6c4-6ec9-40ac-86f0-eef29ac2ec09
Dürr, Stephan
3c3b7060-a99b-4a36-a279-04ba46dd93e5
Guazzini, Damiano
1715b8d1-b547-4938-b590-7ffc7eed747c
Sommer, Rainer
1b793a87-4321-4602-b30c-d5157c4d02a2
Heitger, Jochen
e42a735a-3069-4e79-ad97-6288831cfa5f
Jüttner, Andreas
a90ff7c5-ae8f-4c8e-9679-b5a95b2a6247
Morte, Michele Della, Dürr, Stephan, Guazzini, Damiano, Sommer, Rainer, Heitger, Jochen and Jüttner, Andreas
,
The ALPHA Collaboration
(2008)
Heavy-strange meson decay constants in the continuum limit of quenched QCD.
Journal of High Energy Physics, 2008 (2), .
(doi:10.1088/1126-6708/2008/02/078).
Abstract
We improve a previous quenched result for heavy-light pseudoscalar meson decay constants with the light quark taken to be the strange quark. A finer lattice resolution (a ~ 0.05 fm) in the continuum limit extrapolation of the data computed in the static approximation is included. We also give further details concerning the techniques used in order to keep the statistical and systematic errors at large lattice sizes L/a under control. Our final result, obtained by combining these data with determinations of the decay constant for pseudoscalar mesons around the Ds, follows nicely the qualitative expectation of the 1/m-expansion with a (relative) 1/m-term of about -0.5GeV/mPS. At the physical b-quark mass we obtain FBs = 193(7)MeV, where all errors apart from the quenched approximation are included.
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Published date: 20 February 2008
Keywords:
nonperturbative effects, b-physics, lattice QCD, heavy quarks physics
Organisations:
Theoretical Partical Physics Group
Identifiers
Local EPrints ID: 339206
URI: http://eprints.soton.ac.uk/id/eprint/339206
PURE UUID: 699f6d18-88fb-42a8-8052-4d16b3385c98
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Date deposited: 25 May 2012 09:01
Last modified: 15 Mar 2024 03:20
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Contributors
Author:
Michele Della Morte
Author:
Stephan Dürr
Author:
Damiano Guazzini
Author:
Rainer Sommer
Author:
Jochen Heitger
Corporate Author: The ALPHA Collaboration
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