title: Search for the weak decay of a lightly bound H0 dibaryon
abstract: We present results of a search for a new form of hadronic matter, a six-quark, dibaryon state called the H0, a state predicted to exist in several theoretical models. Analyzing data collected by experiment E799-II at Fermilab, we searched for the decay H0-->Lambdappi(-) and found no candidate events. We place an upper limit on [B(H0-->Lambdappi(-))dsigma(H)/dOmega]/(dsigma(Xi)/dOmega) and, in the context of published models, exclude the region of lightly bound mass states just below the LambdaLambda mass threshold, 2.194<M(H)<2.231 GeV/c(2), with lifetimes from approximately 5x10(-10) sec to approximately 1x10(-3) sec.
authors.affiliation: University of Wisconsin, Madison, Wisconsin 53706, USA.
authors.initials: A
authors.lastname: Alavi-Harati
authors.initials: T
authors.lastname: Alexopoulos
authors.initials: M
authors.lastname: Arenton
authors.initials: K
authors.lastname: Arisaka
authors.initials: S
authors.lastname: Averitte
authors.initials: AR
authors.lastname: Barker
authors.initials: L
authors.lastname: Bellantoni
authors.initials: A
authors.lastname: Bellavance
authors.initials: J
authors.lastname: Belz
authors.initials: R
authors.lastname: Ben-David
authors.initials: DR
authors.lastname: Bergman
authors.initials: E
authors.lastname: Blucher
authors.initials: GJ
authors.lastname: Bock
authors.initials: C
authors.lastname: Bown
authors.initials: S
authors.lastname: Bright
authors.initials: E
authors.lastname: Cheu
authors.initials: S
authors.lastname: Childress
authors.initials: R
authors.lastname: Coleman
authors.initials: MD
authors.lastname: Corcoran
authors.initials: G
authors.lastname: Corti
authors.initials: B
authors.lastname: Cox
authors.initials: MB
authors.lastname: Crisler
authors.initials: AR
authors.lastname: Erwin
authors.initials: R
authors.lastname: Ford
authors.initials: A
authors.lastname: Glazov
authors.initials: A
authors.lastname: Golossanov