Author:
Chen Ying,Chiu Wei-Feng,Gong Ming,Liu Zhaofeng,Ma Yunheng
Abstract
Abstract
On a lattice with 2+1-flavor dynamical domain-wall fermions at the physical pion mass, we calculate the decay constants of
,
, and
. The lattice size is
, which corresponds to a spatial extension of
fm, with a lattice spacing of
fm. For the valence light, strange, and charm quarks, we use overlap fermions at several mass points close to their physical values. Our results at the physical point are
MeV,
MeV,
MeV,
MeV, and
MeV. The couplings of
and
to the tensor current (
) can be derived from ratios
and
, respectively, which are the first lattice quantum chromodynamics (QCD) results. We also obtain ratios
and
, which reflect the size of heavy quark symmetry breaking in charmed mesons. Ratios
and
can be taken as a measure of SU(3) flavor symmetry breaking.
Funder
National Key Research and Development Program of China
National Natural Science Foundation of China
U.S. Department of Energy
National Science Foundation
Subject
Astronomy and Astrophysics,Instrumentation,Nuclear and High Energy Physics
Cited by
20 articles.
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