Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1997-04-30
Eur.Phys.J.C2:697-703,1998
Physics
High Energy Physics
High Energy Physics - Phenomenology
13 pages, Latex, 3 figures included, shortened version, to appear in Z.Phys.C
Scientific paper
10.1007/s100520050173
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.
Guberina Branko
Melic Blazenka
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