HQET at order 1/m: I. Non-perturbative parameters in the quenched approximation

Benoît Blossier, Michele Della Morte, Nicolas Garron, Rainer Sommer

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

We determine non-perturbatively the parameters of the lattice HQET Lagrangian and those of the time component of the heavy-light axial-vector current in the quenched approximation. The HQET expansion includes terms of order 1/m. Our results allow to compute, for example, the heavy-light spectrum and B-meson decay constants in the static approximation and to order 1/m in HQET. The determination of the parameters is separated into universal and non-universal parts. The universal results can be used to determine the parameters for various discretizations. The computation reported in this paper uses the plaquette gauge action and the "HYP1/2" action for the b-quark described by HQET. The parameters of the current also depend on the light-quark action, for which we choose non-perturbatively O(a)-improved Wilson fermions.
OriginalsprogUdefineret/Ukendt
TidsskriftJHEP
ISSN1126-6708
DOI
StatusUdgivet - 26. jan. 2010

Bibliografisk note

31 pages (19 pages + technical appendices) pdflatex. Discussion of vector current removed. Replaced by the published version, references added

Emneord

  • hep-lat

Citer dette

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HQET at order 1/m : I. Non-perturbative parameters in the quenched approximation. / Blossier, Benoît; Morte, Michele Della; Garron, Nicolas; Sommer, Rainer.

I: JHEP, 26.01.2010.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - HQET at order 1/m

T2 - I. Non-perturbative parameters in the quenched approximation

AU - Blossier, Benoît

AU - Morte, Michele Della

AU - Garron, Nicolas

AU - Sommer, Rainer

N1 - 31 pages (19 pages + technical appendices) pdflatex. Discussion of vector current removed. Replaced by the published version, references added

PY - 2010/1/26

Y1 - 2010/1/26

N2 - We determine non-perturbatively the parameters of the lattice HQET Lagrangian and those of the time component of the heavy-light axial-vector current in the quenched approximation. The HQET expansion includes terms of order 1/m. Our results allow to compute, for example, the heavy-light spectrum and B-meson decay constants in the static approximation and to order 1/m in HQET. The determination of the parameters is separated into universal and non-universal parts. The universal results can be used to determine the parameters for various discretizations. The computation reported in this paper uses the plaquette gauge action and the "HYP1/2" action for the b-quark described by HQET. The parameters of the current also depend on the light-quark action, for which we choose non-perturbatively O(a)-improved Wilson fermions.

AB - We determine non-perturbatively the parameters of the lattice HQET Lagrangian and those of the time component of the heavy-light axial-vector current in the quenched approximation. The HQET expansion includes terms of order 1/m. Our results allow to compute, for example, the heavy-light spectrum and B-meson decay constants in the static approximation and to order 1/m in HQET. The determination of the parameters is separated into universal and non-universal parts. The universal results can be used to determine the parameters for various discretizations. The computation reported in this paper uses the plaquette gauge action and the "HYP1/2" action for the b-quark described by HQET. The parameters of the current also depend on the light-quark action, for which we choose non-perturbatively O(a)-improved Wilson fermions.

KW - hep-lat

U2 - 10.1007/JHEP06(2010)002

DO - 10.1007/JHEP06(2010)002

M3 - Tidsskriftartikel

JO - Journal of High Energy Physics (Online)

JF - Journal of High Energy Physics (Online)

SN - 1126-6708

ER -