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