Decay Constants of B and D Mesons from Non-perturbatively Improved Lattice QCD

K. bowler; L. Del Debbio; J. flynn; G. lacagnina; V. lesk; C. maynard; D. richards

doi:10.1016/S0550-3213(01)00511-9

Decay Constants of B and D Mesons from Non-perturbatively Improved Lattice QCD

K. bowler
, L. Del Debbio
, J. flynn
, G. lacagnina
, V. lesk
, C. maynard
, D. richards

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

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 O(a) improved with non-perturbative coefficients. The results are f_B=195(6)(+24/-23) MeV, f_D=206(4)(+17/-10) MeV, f_B_s=220(6)(+23/-28) MeV, f_D_s=229(3)(+23/-12) MeV and f_K= 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.

Original language	English
Pages (from-to)	507-537
Number of pages	30
Journal	Nuclear physics b
Volume	619
Issue number	1-3
DOIs	https://doi.org/10.1016/S0550-3213(01)00511-9
Publication status	Published - 14 Jul 2000

Keywords / Materials (for Non-textual outputs)

hep-lat

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10.1016/S0550-3213(01)00511-9

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http://www.sciencedirect.com/science/article/pii/S0550321301005119

Cite this

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title = "Decay Constants of B and D Mesons from Non-perturbatively Improved Lattice QCD",

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 O(a) improved with non-perturbative coefficients. The results are f\_B=195(6)(+24/-23) MeV, f\_D=206(4)(+17/-10) MeV, f\_B\_s=220(6)(+23/-28) MeV, f\_D\_s=229(3)(+23/-12) MeV and f\_K= 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.",

keywords = "hep-lat",

author = "K. bowler and \{Del Debbio\}, L. and J. flynn and G. lacagnina and V. lesk and C. maynard and D. richards",

note = "Major revision, using new values of improvement coefficients, the scale set by f\_pi, and an extended analysis. 37 Pages, 14 figures. Accepted for publication in NPB",

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doi = "10.1016/S0550-3213(01)00511-9",

language = "English",

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pages = "507--537",

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TY - JOUR

T1 - Decay Constants of B and D Mesons from Non-perturbatively Improved Lattice QCD

AU - bowler, K.

AU - Del Debbio, L.

AU - flynn, J.

AU - lacagnina, G.

AU - lesk, V.

AU - maynard, C.

AU - richards, D.

N1 - Major revision, using new values of improvement coefficients, the scale set by f_pi, and an extended analysis. 37 Pages, 14 figures. Accepted for publication in NPB

PY - 2000/7/14

Y1 - 2000/7/14

N2 - 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 O(a) improved with non-perturbative coefficients. The results are f_B=195(6)(+24/-23) MeV, f_D=206(4)(+17/-10) MeV, f_B_s=220(6)(+23/-28) MeV, f_D_s=229(3)(+23/-12) MeV and f_K= 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.

AB - 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 O(a) improved with non-perturbative coefficients. The results are f_B=195(6)(+24/-23) MeV, f_D=206(4)(+17/-10) MeV, f_B_s=220(6)(+23/-28) MeV, f_D_s=229(3)(+23/-12) MeV and f_K= 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.

KW - hep-lat

U2 - 10.1016/S0550-3213(01)00511-9

DO - 10.1016/S0550-3213(01)00511-9

M3 - Article

SN - 0550-3213

VL - 619

SP - 507

EP - 537

JO - Nuclear physics b

JF - Nuclear physics b

IS - 1-3

ER -

Decay Constants of B and D Mesons from Non-perturbatively Improved Lattice QCD

Abstract

Keywords / Materials (for Non-textual outputs)

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