title: Measurement of decay parameters for Xi- --> Lambda pi- decay.
abstract: 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.
authors.affiliation: Physics Division, Illinois Institute of Technology, Chicago, Illinois 60616, USA.
authors.forename: A
authors.initials: A
authors.lastname: Chakravorty
authors.forename: H T
authors.initials: HT
authors.lastname: Diehl
authors.forename: J
authors.initials: J
authors.lastname: Duryea
authors.forename: G
authors.initials: G
authors.lastname: Guglielmo
authors.forename: K
authors.initials: K
authors.lastname: Heller
authors.forename: P M
authors.initials: PM
authors.lastname: Ho
authors.forename: C
authors.initials: C
authors.lastname: James
authors.forename: K
authors.initials: K
authors.lastname: Johns
authors.forename: D M
authors.initials: DM
authors.lastname: Kaplan
authors.forename: M J
authors.initials: MJ
authors.lastname: Longo
authors.forename: K B
authors.initials: KB
authors.lastname: Luk
authors.forename: R
authors.initials: R
authors.lastname: Rameika
authors.forename: H A
authors.initials: HA
authors.lastname: Rubin
authors.forename: S
authors.initials: S
authors.lastname: Teige
authors.forename: G B
authors.initials: GB
authors.lastname: Thomson
authors.forename: Y
authors.initials: Y
authors.lastname: Zou