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Inclusive charmed-baryon decays and lifetimes


We have quantitatively reanalyzed the inclusive charmed-baryon decays. New ingredients are the Voloshin preasymptotic effects in semileptonic decays and the Cabibbo-subleading contributions to both semileptonic and nonleptonic decays. It has been found that the Cabbibo-subleading Voloshin contribution essentially improves the theoretical semileptonic branching ratio of \(\Lambda_c^{+}\), in agreement with experiment. The semileptonic branching ratios for \(\Xi_c^{+}\) and \(\Omega_c^{0}\) are found to be large, i.e., of the order of 20%. The lifetimes hierarchy is in a good qualitative and even quantitative agreement with experiment except for the \(\Xi_c^{+}\) lifetime, which is somewhat smaller than the experimental value. Future measurements, especially measurements of the semileptonic branching ratios for \(\Omega_c^{0}\), \(\Xi_c^{+}\) and \(\Xi_c^{0}\) should be decisive for the check of this approach.

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Received: 29 April 1997 / Revised version: 25 June 1997 / Published online: 20 February 1998

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Guberina, B., Melić, B. Inclusive charmed-baryon decays and lifetimes. Eur. Phys. J. C 2, 697–703 (1998).

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  • Quantitative Agreement
  • Semileptonic Decay
  • Future Measurement
  • Nonleptonic Decay