https://doi.org/10.1140/epjc/s10052-020-7965-z
Regular Article - Theoretical Physics
Decay constant of 
and 
mesons from 
lattice QCD
1
Laboratoire de Physique Théorique, Unité Mixte de Recherche 8627 du Centre National de la Recherche Scientifique, CNRS, Univ. Paris-Sud et Université Paris-Saclay, Bâtiment 210, 91405, Orsay Cedex, France
2
Nikhef, Science Park 105, NL-1098, XG, Amsterdam, The Netherlands
* e-mail: benoit.blossier@th.u-psud.fr
Received:
9
January
2020
Accepted:
24
April
2020
Published online:
12
May
2020
We report on a two-flavor lattice QCD estimate of the and leptonic decays parameterized by the decay constants 
and 
. In addition to their relevance for phenomenology, their extraction has allowed us to investigate whether the “step scaling in mass” strategy is suitable with Wilson–Clover fermions to smoothly extrapolate quantities of the heavy-strange sector up to the bottom scale. From the central value of 
quoted by FLAG at 
and our ratio 
, we obtain 
MeV and 
.
© The Author(s), 2020
