Decays of baryon resonances into ΛK+, ΣK+ and Σ+K0

  • A. V. Sarantsev
  • V. A. Nikonov
  • A. V. Anisovich
  • E. Klempt
  • U. Thoma
Original Article

Abstract.

Cross-sections, beam asymmetries, and recoil polarisations for the reactions γpK+Λ;γpK+Σ0, and γpK0Σ+ have been measured by the SAPHIR, CLAS, and LEPS Collaborations with high statistics and good angular coverage for centre-of-mass energies between 1.6 and 2.3 GeV. The combined analysis of these data with data from π and η photoproduction reveals evidence for new baryon resonances in this energy region. A new P11 state with mass 1840 MeV and width 140 MeV was observed contributing to most of the fitted reactions. The data demand the presence of two D13 states at 1875 and, optimistically, at 2170 MeV.

PACS.

11.80.Et Partial-wave analysis 13.30.-a Decays of baryons 13.60.Le Meson production 14.20.Gk Baryon resonances with S = 0 

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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2005

Authors and Affiliations

  • A. V. Sarantsev
    • 1
    • 2
  • V. A. Nikonov
    • 1
    • 2
  • A. V. Anisovich
    • 1
    • 2
  • E. Klempt
    • 1
  • U. Thoma
    • 1
    • 3
  1. 1.Helmholtz-Institut für Strahlen- und KernphysikUniversität BonnGermany
  2. 2.Petersburg Nuclear Physics InstituteGatchinaRussia
  3. 3.Physikalisches InstitutUniversität GießenGermany

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