HQET at order : I. Non-perturbative parameters in the quenched approximation
Jan, 2010
31 pages
Published in:
- JHEP 06 (2010) 002
e-Print:
- 1001.4783 [hep-lat]
Report number:
- DESY-09-153,
- IFT-UAM-CSIC-09-47,
- MKPH-T-09-18,
- SFB-CPP-10-01
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Abstract: (arXiv)
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.Note:
- 31 pages (19 pages + technical appendices) pdflatex. Discussion of vector current removed. Replaced by the published version, references added
- 12.38.Gc
- 12.39.Hg
- 14.40.Nd
- Lattice QCD
- B-Physics
- Heavy Quark Physics
- approximation: quenching
- approximation: static
- fermion: Wilson
- B: decay
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