Search for an exotic S = -2, Q = -2 baryon resonance at a mass near 1862-MeV in quasi-real photoproduction

Collaboration
Dec, 2004
5 pages
Published in:
  • Phys.Rev.D 71 (2005) 032004
e-Print:
Report number:
  • DESY-04-239
Experiments:

Citations per year

20042008201220162018024681012
Abstract: (arXiv)
A search for an exotic baryon resonance with S=2,Q=2S=-2, Q=-2 has been performed in quasi-real photoproduction on a deuterium target through the decay channel ΞπΛππpπππ\Xi^- \pi^- \to \Lambda \pi^- \pi^- \to p \pi^- \pi^- \pi^-. No evidence for a previously reported Ξ(1860)\Xi^{--}(1860) resonance is found in the Ξπ\Xi^- \pi^-invariant mass spectrum. An upper limit for the photoproduction cross section of 2.1 nb is found at the 90% confidence level. The photoproduction cross section for the Ξ0(1530)\Xi^{0}(1530) is found to be between 9 and 24 nb.
  • 13.60.-r
  • 14.20.-c
  • 13.60.Rj
  • 12.39.Mk
  • positron deuteron: inclusive reaction
  • baryon resonance: exotic
  • pentaquark: search for
  • postulated particle: Xi(1862)
  • mass spectrum: (p 3pi-)
  • Xi(1530): hadroproduction