Abstract

We report on the computation of the Bs 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 of the first radially excited state in the Bs sector, computed in the static limit

Details

Title
HQET at order 1/m: III. Decay constants in the quenched approximation
Author
Blossier Benoît 1 ; Della Morte Michele 2 ; Garron Nicolas 3 ; von Hippel Georg 4 ; Mendes Tereza 5 ; Simma Hubert 6 ; Sommer, Rainer 6 

 CNRS et Université Paris-Sud XI, Laboratoire de Physique Théorique, Orsay Cedex, France (GRID:grid.5842.b) (ISNI:0000 0001 2171 2558) 
 Johannes-Gutenberg-Universität Mainz, Institut für Kernphysik, Mainz, Germany (GRID:grid.5802.f) (ISNI:0000000119417111) 
 Universidad Autónoma de Madrid, Departamento de Física Teórica and Instituto de Física Teórica IFT - UAM/CSIC, Madrid, Spain (GRID:grid.5515.4) (ISNI:0000000119578126); University of Edinburgh, SUPA, School of Physics and Astronomy, Edinburgh, U.K. (GRID:grid.4305.2) (ISNI:0000000419367988) 
 Johannes-Gutenberg-Universität Mainz, Institut für Kernphysik, Mainz, Germany (GRID:grid.5802.f) (ISNI:0000000119417111); NIC, DESY, Zeuthen, Germany (GRID:grid.7683.a) (ISNI:0000 0004 0492 0453) 
 NIC, DESY, Zeuthen, Germany (GRID:grid.7683.a) (ISNI:0000 0004 0492 0453); IFSC, University of São Paulo, São Carlos SP, Brazil (GRID:grid.11899.38) (ISNI:0000000419370722) 
 NIC, DESY, Zeuthen, Germany (GRID:grid.7683.a) (ISNI:0000 0004 0492 0453) 
Publication year
2010
Publication date
Dec 2010
Publisher
Springer Nature B.V.
e-ISSN
10298479
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2397988249
Copyright
© The Author(s) 2010. Open Access This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited. This work is published under https://creativecommons.org/licenses/by-nc/2.0 (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.