title: Search for exotic baryons in 800 GeV pp-->pXi+/-piX reactions.
abstract: We report the results of a high-statistics, sensitive search for narrow baryon resonances decaying to Xi-pi-, Xi-pi+, Xi+pi-, and Xi+pi+. The only resonances observed are the well known Xi0(1530) and Xi0(1530). No evidence is found for the states near 1862 MeV, previously reported by NA49 [Phys. Rev. Lett. 92, 042003 (2003)]. At the 95% confidence level, we find the upper limit for the production of a Gaussian enhancement with sigma=7.6 MeV in the Xi-pi- effective mass spectrum to be 0.3% of the number of observed Xi0(1530)-->Xi-pi+. We find similarly restrictive upper limits for an enhancement at 1862 MeV in the Xi-pi+, Xi+pi-, and Xi+pi+ mass spectra.
authors.affiliation: Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.
authors.forename: D C
authors.initials: DC
authors.lastname: Christian
authors.forename: J
authors.initials: J
authors.lastname: Felix
authors.forename: E E
authors.initials: EE
authors.lastname: Gottschalk
authors.forename: G
authors.initials: G
authors.lastname: Gutierrez
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: 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