Asymmetry in the nonmesonic weak decay of polarized (5)(Lambda)He hypernuclei
We have measured the asymmetric emission of protons from the nonmesonic decay of polarized (5)(Lambda)He produced by the (pi(+), K+) reaction. (5)(Lambda)He is an s-shell hypernucleus and its polarization is due to the Lambda. One expects to obtain direct information on the elementary weak Lambda-->p-->np process. The asymmetry parameter has been determined to be 0.24+/-0.22. The implication of the result is discussed.
Ajimura
S
Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan.
Ikeda
K
Ishikawa
M
Kishimoto
T
Okusu
A
Shinkai
N
Tanaka
Y
Ejiri
H
Nakano
T
Manabe
K
Nagae
T
Noumi
H
Sekimoto
M
Shibata
T
Hashimoto
O
Maeda
K
Takahashi
T
Hasegawa
T
Bhang
H
Kim
YD
Park
H
Youn
M