Measurements of Absolute Branching Fractions for Exclusive D 0 Semileptonic Decays
Abstract
Based on a data sample of 60 pb
−1
collected at the
ψ(3770)
resonance with the CLEO-c detector at CESR, we present improved measurements of absolute branching fractions for exclusive
D
0
semileptonic decays into
K
−
e
+
ν
,
π
−
e
+
ν
and
K
∗−
e
+
ν
, and the first observation and measurement of
D
0
→
ρ
−
e
+
ν
. The determinations of the CKM matrix elements
V
cs
and
V
cd
are reviewed.