Impro
ved
Measuremen
t of
B
+
!
+
0
and
Determination
of
the
CKM
Angle
We presen
t impro
ved
measuremen
ts of the
branc
hing
fraction
B
, the
longitudinal
polarization
fraction
f
L
, and
the
direct
CP
asymmetry
A
CP
in the
B
meson
deca
y channel
B
+
!
+
0
. The
data
sample
was collected
with
the
B
A
B
AR
detector
at SLA
C.
The
results
are
B
(
B
+
!
+
0
) =
(23
:
7
1
:
4
1
:
4)
10