DOI 10.1007/s100529800719
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 , in agreement with
experiment. The semileptonic branching ratios for
and
are found to be large, i.e., of the order of
. The lifetimes hierarchy is
in
a good qualitative and even quantitative agreement with experiment except
for the
lifetime, which is somewhat smaller than the experimental
value.
Future measurements, especially measurements of the semileptonic branching
ratios for
,
and
should be decisive for the check of
this
approach.
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