@Article{Bernardoni_etal2014,
author="Bernardoni, F.
and Blossier, B.
and Bulava, J.
and Della Morte, M.
and Fritzsch, P.
and Garron, N.
and Gerardin, A.
and Heitger, J.
and von Hippel, G.
and Simma, H.
and Sommer, R.",
title="Decay constants of B-mesons from non-perturbative HQET with two light dynamical quarks",
journal="Physics Letters B",
year="2014",
publisher="Elsevier Science Bv",
volume="735",
pages="349--356",
optkeywords="Lattice QCD; Heavy Quark Effective Theory; Bottom quarks; Meson decay",
abstract="We present a computation of B-meson decay constants from lattice QCD simulations within the framework of Heavy Quark Effective Theory for the b-quark. The next-to-leading order corrections in the HQET expansion are included non-perturbatively. Based on N-f = 2 gauge field ensembles, covering three lattice spacings a approximate to (0.08-0.05) fm and pion masses down to 190 MeV, a variational method for extracting hadronic matrix elements is used to keep systematic errors under control. In addition we perform a careful autocorrelation analysis in the extrapolation to the continuum and to the physical pion mass limits. Our final results read f(B) = 186(13) MeV, f(Bs) = 224(14) MeV and f(Bs)/f(B) = 1.203(65). A comparison with other results in the literature does not reveal a dependence on the number of dynamical quarks, and effects from truncating HQET appear to be negligible.",
optnote="WOS:000340048900061",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=1881), last updated on Tue, 02 Sep 2014 19:38:14 +0000",
issn="0370-2693",
doi="10.1016/j.physletb.2014.06.051",
opturl="http://arxiv.org/abs/arXiv:1404.3590",
opturl="https://doi.org/10.1016/j.physletb.2014.06.051",
archivePrefix="arXiv",
eprint="arXiv:1404.3590",
language="English"
}