HQET at order 1/m: III. Decay constants in the quenched approximation

Benoît Blossier, Michele Della Morte, Nicolas Garron, Georg von Hippel, Tereza Mendes, Hubert Simma, Rainer Sommer

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

We report on the computation of the $B_s$ meson decay constant in Heavy Quark Effective Theory on the lattice. The next to leading order corrections in the HQET expansion are included non-perturbatively. We estimate higher order contributions to be very small. The results are extrapolated to the continuum limit, the main systematic error affecting the computation is therefore the quenched approximation used here. The Generalized Eigenvalue Problem and the use of all-to-all propagators are important technical ingredients of our approach that allow to keep statistical and systematic errors under control. We also report on the decay constant $f_{B'_s}$ of the first radially excited state in the $B_s$ sector, computed in the static limit.
OriginalsprogUdefineret/Ukendt
TidsskriftJHEP
ISSN1126-6708
DOI
StatusUdgivet - 30. jun. 2010

Bibliografisk note

(1+17) pages, 4 figures (7 pdf files); corrected eqn. (3.4), clarified discussion of RGI matrix element

Emneord

  • hep-lat

Citer dette

Blossier, B., Morte, M. D., Garron, N., Hippel, G. V., Mendes, T., Simma, H., & Sommer, R. (2010). HQET at order 1/m: III. Decay constants in the quenched approximation. JHEP. https://doi.org/10.1007/JHEP12(2010)039
Blossier, Benoît ; Morte, Michele Della ; Garron, Nicolas ; Hippel, Georg von ; Mendes, Tereza ; Simma, Hubert ; Sommer, Rainer. / HQET at order 1/m : III. Decay constants in the quenched approximation. I: JHEP. 2010.
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HQET at order 1/m : III. Decay constants in the quenched approximation. / Blossier, Benoît; Morte, Michele Della; Garron, Nicolas; Hippel, Georg von; Mendes, Tereza; Simma, Hubert; Sommer, Rainer.

I: JHEP, 30.06.2010.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - HQET at order 1/m

T2 - III. Decay constants in the quenched approximation

AU - Blossier, Benoît

AU - Morte, Michele Della

AU - Garron, Nicolas

AU - Hippel, Georg von

AU - Mendes, Tereza

AU - Simma, Hubert

AU - Sommer, Rainer

N1 - (1+17) pages, 4 figures (7 pdf files); corrected eqn. (3.4), clarified discussion of RGI matrix element

PY - 2010/6/30

Y1 - 2010/6/30

N2 - We report on the computation of the $B_s$ meson decay constant in Heavy Quark Effective Theory on the lattice. The next to leading order corrections in the HQET expansion are included non-perturbatively. We estimate higher order contributions to be very small. The results are extrapolated to the continuum limit, the main systematic error affecting the computation is therefore the quenched approximation used here. The Generalized Eigenvalue Problem and the use of all-to-all propagators are important technical ingredients of our approach that allow to keep statistical and systematic errors under control. We also report on the decay constant $f_{B'_s}$ of the first radially excited state in the $B_s$ sector, computed in the static limit.

AB - We report on the computation of the $B_s$ meson decay constant in Heavy Quark Effective Theory on the lattice. The next to leading order corrections in the HQET expansion are included non-perturbatively. We estimate higher order contributions to be very small. The results are extrapolated to the continuum limit, the main systematic error affecting the computation is therefore the quenched approximation used here. The Generalized Eigenvalue Problem and the use of all-to-all propagators are important technical ingredients of our approach that allow to keep statistical and systematic errors under control. We also report on the decay constant $f_{B'_s}$ of the first radially excited state in the $B_s$ sector, computed in the static limit.

KW - hep-lat

U2 - 10.1007/JHEP12(2010)039

DO - 10.1007/JHEP12(2010)039

M3 - Tidsskriftartikel

JO - Journal of High Energy Physics (Online)

JF - Journal of High Energy Physics (Online)

SN - 1126-6708

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