Search for an exotic S = -2, Q = -2 baryon resonance at a mass near 1862-MeV in quasi-real photoproduction
Dec, 20045 pages
Published in:
- Phys.Rev.D 71 (2005) 032004
e-Print:
- hep-ex/0412027 [hep-ex]
Report number:
- DESY-04-239
Experiments:
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Abstract: (arXiv)
A search for an exotic baryon resonance with S=−2,Q=−2 has been performed in quasi-real photoproduction on a deuterium target through the decay channel Ξ−π−→Λπ−π−→pπ−π−π−. No evidence for a previously reported Ξ−−(1860) resonance is found in the Ξ−π−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) 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
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