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Decay constants of B and D mesons from non-perturbatively improved lattice QCD

Decay constants of B and D mesons from non-perturbatively improved lattice QCD
Decay constants of B and D mesons from non-perturbatively improved lattice QCD
The decay constants of B, D and K mesons are computed in quenched lattice QCD at two different values of the coupling. The action and operators are improved with non-perturbative coefficients. The results are fB=195(6)+24?23 MeV, fD=206(4)+17?10 MeV, fBs=220(6)+23?28 MeV, fDs=229(3)+23?12 MeV and fK=150(3)+12?8 MeV. Systematic errors are discussed in detail. Results for vector decay constants, flavour symmetry breaking ratios of decay constants, the pseudoscalar-vector mass splitting and D meson masses are also presented.
0550-3213
507-533
Bowler, K.C.
71ad656a-1810-4f30-b7fc-bad2e07e75ca
Del Debbio, L.
eb1f4721-c63c-4b6b-8035-df1bd82e8baf
Flynn, J.M.
d8e90963-ba56-415c-bbd4-496b7d91d343
Lacagnina, G.N.
207c13d7-32ff-486e-85ae-641e882b488f
Lesk, V.I.
03943047-d440-433f-bcad-73821fa16939
Maynard, C.M.
379b1165-7a0a-4ea4-b900-b094aac31c71
Richards, D.G.
edef22f8-0ab0-453b-8229-fdb70ac07ce6
UKQCD Collaboration
Bowler, K.C.
71ad656a-1810-4f30-b7fc-bad2e07e75ca
Del Debbio, L.
eb1f4721-c63c-4b6b-8035-df1bd82e8baf
Flynn, J.M.
d8e90963-ba56-415c-bbd4-496b7d91d343
Lacagnina, G.N.
207c13d7-32ff-486e-85ae-641e882b488f
Lesk, V.I.
03943047-d440-433f-bcad-73821fa16939
Maynard, C.M.
379b1165-7a0a-4ea4-b900-b094aac31c71
Richards, D.G.
edef22f8-0ab0-453b-8229-fdb70ac07ce6

Bowler, K.C., Del Debbio, L., Flynn, J.M., Lacagnina, G.N., Lesk, V.I., Maynard, C.M. and Richards, D.G. , UKQCD Collaboration (2001) Decay constants of B and D mesons from non-perturbatively improved lattice QCD. Nuclear Physics B, 619 (1-3), 507-533. (doi:10.1016/S0550-3213(01)00511-9).

Record type: Article

Abstract

The decay constants of B, D and K mesons are computed in quenched lattice QCD at two different values of the coupling. The action and operators are improved with non-perturbative coefficients. The results are fB=195(6)+24?23 MeV, fD=206(4)+17?10 MeV, fBs=220(6)+23?28 MeV, fDs=229(3)+23?12 MeV and fK=150(3)+12?8 MeV. Systematic errors are discussed in detail. Results for vector decay constants, flavour symmetry breaking ratios of decay constants, the pseudoscalar-vector mass splitting and D meson masses are also presented.

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Published date: 2001

Identifiers

Local EPrints ID: 14683
URI: https://eprints.soton.ac.uk/id/eprint/14683
ISSN: 0550-3213
PURE UUID: deb6a22c-3082-4c83-8aba-57f60cc95cf6
ORCID for J.M. Flynn: ORCID iD orcid.org/0000-0002-6280-1677

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Date deposited: 18 Feb 2005
Last modified: 06 Jun 2018 13:09

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