Further evidence for the decay K+ -->pi+nu(nu).
Additional evidence for the rare kaon decay K+-->pi+nu(nu) has been found in a new data set with comparable sensitivity to the previously reported result. One new event was observed in the pion momentum region examined, 211<P<229 MeV/c, bringing the total for the combined data set to two. Including all data taken, the backgrounds were estimated to contribute 0.15+/-0.05 events. The branching ratio is B(K+-->pi+nu(nu)) = 1.57(+1.75)(-0.82)x10(-10).
Adler
S
S
Brookhaven National Laboratory, Upton, New York 11973.
Bazarko
A O
AO
Bergbusch
P C
PC
Blackmore
E W
EW
Bryman
D A
DA
Chen
S
S
Chiang
I-H
IH
Diwan
M V
MV
Frank
J S
JS
Haggerty
J S
JS
Hu
J
J
Inagaki
T
T
Ito
M
M
Jain
V
V
Kabe
S
S
Kettell
S H
SH
Kitching
P
P
Kobayashi
M
M
Komatsubara
T K
TK
Konaka
A
A
Kuno
Y
Y
Kuriki
M
M
Li
K K
KK
Littenberg
L S
LS
Macdonald
J A
JA
Meyers
P D
PD
Mildenberger
J
J
Miyajima
M
M
Muramatsu
N
N
Nakano
T
T
Ng
C
C
Ng
S
S
Numao
T
T
Poutissou
J-M
JM
Poutissou
R
R
Redlinger
G
G
Sato
T
T
Shimada
K
K
Shimoyama
T
T
Shinkawa
T
T
Shoemaker
F C
FC
Stone
J R
JR
Strand
R C
RC
Sugimoto
S
S
Tamagawa
Y
Y
Witzig
C
C
Yoshimura
Y
Y