Three-body nonmesonic weak decay of the (Lambda)12C hypernucleus.
We have measured the branching ratio of the three-body process in the nonmesonic weak decay of Lambda12C to be 0.29+/-0.13. This result was obtained by reproducing the nucleon and the nucleon pair yields introducing a measured final state interaction. At the same time, we have determined the absolute decay widths, Gamma(n) and Gamma(p), along with Gamma2N, whose relative ratio has been a long-standing puzzle. Including the three-body process, we have successfully reproduced the nucleon energy distribution, the coincidence two-nucleon angular correlation, and the momentum sum distribution simultaneously.
Kim
M
M
Department of Physics and Astronomy, Seoul National University, Seoul, 151-747, Korea.
Ajimura
S
S
Aoki
K
K
Banu
A
A
Bhang
H
H
Fukuda
T
T
Hashimoto
O
O
Hwang
J I
JI
Kameoka
S
S
Kang
B H
BH
Kim
E
E
Kim
J H
JH
Maruta
T
T
Miura
Y
Y
Miyake
Y
Y
Nagae
T
T
Nakamura
M
M
Nakamura
S N
SN
Noumi
H
H
Okada
S
S
Okayasu
Y
Y
Outa
H
H
Park
H
H
Saha
P K
PK
Sato
Y
Y
Sekimoto
M
M
Takahashi
T
T
Tamura
H
H
Tanida
K
K
Toyoda
A
A
Tshoo
K
K
Tsukada
K
K
Watanabe
T
T
Yim
H J
HJ