Charmed-meson decay constants in three-flavor lattice QCD.
We present the first lattice QCD calculation with realistic sea quark content of the D+-meson decay constant f(D+). We use the MILC Collaboration's publicly available ensembles of lattice gauge fields, which have a quark sea with two flavors (up and down) much lighter than a third (strange). We obtain f(D+)=201+/-3+/-17 MeV, where the errors are statistical and a combination of systematic errors. We also obtain f(Ds)=249+/-3+/-16 MeV for the Ds meson.
Aubin
C
C
Physics Department, Columbia University, New York, New York 10027, USA.
Bernard
C
C
Detar
C
C
Di Pierro
M
M
Freeland
E D
ED
Gottlieb
Steven
S
Heller
U M
UM
Hetrick
J E
JE
El-Khadra
A X
AX
Kronfeld
A S
AS
Levkova
L
L
Mackenzie
P B
PB
Menscher
D
D
Maresca
F
F
Nobes
M
M
Okamoto
M
M
Renner
D
D
Simone
J
J
Sugar
R
R
Toussaint
D
D
Trottier
H D
HD