title: Lambda(0) polarization in 800-GeV/cpp --> p(f)(Lambda0K+).
abstract: We report results from a study of Lambda(0) polarization in the exclusive reaction pp --> p(f)(Lambda0K+) at 800-GeV/c. We observe a dependence of the polarization on the Lambda0K+ invariant mass with large (+71%) positive polarization at small mass (1.63-GeV/c(2)) and large (-43%) negative polarization at large mass (2.75-GeV/c(2)). This observation confirms the result of the CERN ISR R608 experiment and extends the range over which the effect is observed. The strong dependence of the polarization on the Lambda0K+ invariant mass suggests that the origin of the polarization is closely related to the production dynamics of the diffractively produced Lambda0K+ system.
authors.affiliation: Universidad de Guanajuato, León, Guanajuato, México.
authors.forename: J
authors.initials: J
authors.lastname: Félix
authors.forename: M C
authors.initials: MC
authors.lastname: Berisso
authors.forename: D C
authors.initials: DC
authors.lastname: Christian
authors.forename: A
authors.initials: A
authors.lastname: Gara
authors.forename: E E
authors.initials: EE
authors.lastname: Gottschalk
authors.forename: G
authors.initials: G
authors.lastname: Gutiérrez
authors.forename: E P
authors.initials: EP
authors.lastname: Hartouni
authors.forename: B C
authors.initials: BC
authors.lastname: Knapp
authors.forename: M N
authors.initials: MN
authors.lastname: Kreisler
authors.forename: S
authors.initials: S
authors.lastname: Lee
authors.forename: K
authors.initials: K
authors.lastname: Markianos
authors.forename: G
authors.initials: G
authors.lastname: Moreno
authors.forename: M A
authors.initials: MA
authors.lastname: Reyes
authors.forename: M
authors.initials: M
authors.lastname: Sosa
authors.forename: M H L S
authors.initials: MH
authors.lastname: Wang
authors.forename: A
authors.initials: A
authors.lastname: Wehmann
authors.forename: D
authors.initials: D
authors.lastname: Wesson