Measurement of decay parameters for Xi- --> Lambda pi- decay.
Based on 1.35 x 10(6) polarized Xi(-) events, we measure the parameter phi(Xi) to be -1.61 degrees +/-2.66 degrees +/-0.37 degrees for the Xi(-)-->Lambda pi(-) decay. New results for the parameters beta(Xi) and gamma(Xi) are also presented. Assuming that the CP-violating phase difference is negligible, we deduce the strong phase difference between the P-wave and S-wave amplitudes of the Lambda pi final state to be 3.17 degrees +/-5.28 degrees +/-0.73 degrees, reducing the uncertainty in estimating the level of CP violation in Xi-hyperon decay.
Chakravorty
A
A
Physics Division, Illinois Institute of Technology, Chicago, Illinois 60616, USA.
Diehl
H T
HT
Duryea
J
J
Guglielmo
G
G
Heller
K
K
Ho
P M
PM
James
C
C
Johns
K
K
Kaplan
D M
DM
Longo
M J
MJ
Luk
K B
KB
Rameika
R
R
Rubin
H A
HA
Teige
S
S
Thomson
G B
GB
Zou
Y
Y