Measurement of XI(c) production in e+ e- annihilation at 10.5-GeV center-of-mass energy

The ARGUS collaboration Albrecht, H. ; Ehrlichmann, H. ; Harder, G. ; et al.
Phys.Lett.B 247 (1990) 121-126, 1990.
Inspire Record 296522 DOI 10.17182/hepdata.29678

Using the ARGUS detector at the e + e − storage ring DORIS II at DESY, we have observed production of the charmed-strange baryon Ξ c + and its neutral isospin partner, the Ξ c 0 . The Ξ c + was reconstructed in the final state Ξ − π + π + , while the Ξ c 0 was seen in decay to Ξ − π + and Ξ − π + π + π − . The average Ξ c fragmentation spectrum has been determined, as well as the production cross section times branching ratio for each decay mode. The charged and neutral masses were measured to be 2465.1 ± 3.6 ± 1.9 MeV/ c 2 and 2472.1 ± 2.7 ± 1.6 MeV/ c 2 respectively, corresponding to a mass-splitting, M ( Ξ c + ) − M ( Ξ c 0 ), of −7.0±4.5±2.2 MeV/ c 2 .

2 data tables

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Data requested from authors.