The European Physical Journal C

ISSN: 1434-6044 (printed version)
ISSN: 1434-6052 (electronic version)

Table of Contents

Abstract Volume 2 Issue 4 (1998) pp 697-703
DOI 10.1007/s100529800719

theoretical physics:
Inclusive charmed-baryon decays and lifetimes

Branko Guberina, Blazenka Melic

Theoretical Physics Division, Rudjer Boskovic Institute, P.O.B.1016, HR-10001 Zagreb, Croatia (e-mail: guberina@thphys.irb.hr, melic@thphys.irb.hr)

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

Abstract. 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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Online publication: May 25, 1998
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