Sigma-nucleus potential in A=28.
We have studied the (pi(-),K+) reaction on a silicon target to investigate the sigma-nucleus potential. The inclusive spectrum was measured at a beam momentum of 1.2 GeV/c with an energy resolution of 3.3 MeV (FWHM) by employing the superconducting kaon spectrometer system. The spectrum was compared with theoretical calculations within the framework of the distorted-wave impulse approximation, which demonstrates that a strongly repulsive sigma-nucleus potential with a nonzero size of the imaginary part reproduces the observed spectrum.
Noumi
H
H
High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan.
Saha
P K
PK
Abe
D
D
Ajimura
S
S
Aoki
K
K
Bhang
H C
HC
Endo
T
T
Fujii
Y
Y
Fukuda
T
T
Guo
H C
HC
Imai
K
K
Hashimoto
O
O
Hotchi
H
H
Kim
E H
EH
Kim
J H
JH
Kishimoto
T
T
Krutenkova
A
A
Maeda
K
K
Nagae
T
T
Nakamura
M
M
Outa
H
H
Sekimoto
M
M
Saito
T
T
Sakaguchi
A
A
Sato
Y
Y
Sawafta
R
R
Shimizu
Y
Y
Takahashi
T
T
Tang
L
L
Tamura
H
H
Tanida
K
K
Watanabe
T
T
Xia
H H
HH
Zhou
S H
SH
Zhu
L H
LH
Zhu
X F
XF