About   Contents   Introduction   Synopsis   Search   Subject Index   Summaries   Texts

BIAGI 1985C

Biagi, S.F. et al.
Properties of the Charmed Strange Baryon Ξ_c(2460)⁺ and Evidence for the Charmed Doubly Strange Baryon Ω_c at 2.74 GeV/c²
Z. Phys. C28 (1985) 175;

Abstracts
Results are presented from experiment WA62, which searched for charmed strange baryon states produced in Σ^–-nucleus interactions in the SPS charged hyperon beam at CERN. Properties of the A⁺ (csu) baryon at 2.46 GeV/c² are summarized and upper limits are given for decay branching ratios into various channels. Three events observed at 2.74 GeV/c² in the Ξ^– K^– π⁺ π⁺ mass spectrum are interpreted as the first evidence for the T^o baryon with quark content css. Results of a search for the A^o (csd), the isospin partner of the A⁺, are presented. The results are discussed in the context of current theoretical understanding, and a comparison with other experiments on hadroproduction of charmed baryons is made.

Accelerator CERN-SPS Detectors SPEC

Related references
More (earlier) information appears in
S. F. Biagi et al., Phys. Lett. 150B (1985) 230;
S. F. Biagi et al., Phys. Lett. 122B (1983) 455;

Reactions

	Σ– Be Λ K– 2π+ X	135 GeV (Plab)	mass
	Σ– Be p anti-Ko K– π+ X	135 GeV (Plab)	mass
	Σ– Be p 2K– 2π+ X	135 GeV (Plab)	mass
	Σ– Be Ω– K+ π+ X	135 GeV (Plab)	mass
	Σ– Be Λ anti-K*(892)o π+ X	135 GeV (Plab)	mass
	Σ– Be Λ K– π+ πo X	135 GeV (Plab)	mass
	Σ– Be Ω– K+ X	135 GeV (Plab)	mass
	Σ– Be p 2K– π+ X	135 GeV (Plab)	mass
	Σ– Be p anti-Ko K– X	135 GeV (Plab)	mass
	Σ– Be Ξ– K– 2π+ X	135 GeV (Plab)	mass
	Σ– Be XI/C+! X	135 GeV (Plab)
	Σ– Be XI/C0! X	135 GeV (Plab)
	Σ– Be Ωc X	135 GeV (Plab)
	XI/C+! Λ K– 2π+
	XI/C+! p anti-Ko K– π+
	XI/C+! p 2K– 2π+
	XI/C+! Ω– K+ π+
	XI/C+! Λ anti-K*(892)o π+
	XI/C0! Λ K– π+ πo
	XI/C0! Ω– K+
	XI/C0! p 2K– π+
	XI/C0! p anti-Ko K–
	Ωc Ξ– K– 2π+

Particles studied

	XI/C+	w, mass
	Ωc	mass

Record comments
First evidence for the Ω_c.

New Comments List of Comments About   Contents   Introduction   Synopsis   Search   Subject Index   Summaries   Texts