Published September 6, 1990 | Version v1
Journal article

Measurement of Ξc production in e+e- annihilation at 10.5 GeV center-of-mass energy

  • 1. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany, F.R.)
  • 2. Dortmund Univ. (Germany, F.R.). Inst. fuer Physik
  • 3. Erlangen-Nuernberg Univ., Erlangen (Germany, F.R.). Physikalisches Inst.
  • 4. Heidelberg Univ. (Germany, F.R.). Inst. fuer Hochenergiephysik
  • 5. Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany, F.R.)
  • 6. Institute of Particle Physics (Canada)
  • 7. Karlsruhe Univ. (T.H.) (Germany, F.R.). Inst. fuer Experimentelle Kernphysik
  • 8. Ljubljana Univ. (Yugoslavia). Dept. of Physics
  • 9. Institut Jozef Stefan, Ljubljana (Yugoslavia)
  • 10. Lund Univ. (Sweden). Inst. of Physics
  • 11. AN SSSR, Moscow. Inst. Teoreticheskoj i Ehksperimental'noj Fiziki
  • 12. South Carolina Univ., Columbia (USA)

Description

Using the ARGUS detector at the e+e- storage ring DORIS II at DESY, we have observed production of the charmed-strange baryon Ξc+ and its neutral isospin partner, the Ξc0. The Ξc+ was reconstructed in the final state Ξ-π+π+, thile the Ξc0 was seen in decay to Ξ-π+ and Ξ-π+π+π-. The average Ξc 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/c2 and 2472.1±2.7±1.6 MeV/c2 respectively, corresponding to a mass-splitting, M(Ξc+)-M(Ξc0), of -7.0±4.5±2.2 MeV/c2. (orig.)

Additional details

Publishing Information

Journal Title
Physics Letters, (Section) B
Journal Volume
247
Journal Issue
1
Series
Phys. Lett., B.
Journal Page Range
121-126
ISSN
0370-2693
CODEN
PYLBA