Enhancement of preasymptotic effects in inclusive beauty decays

Guberina, Branko; Melić, Blaženka; Štefančić, Hrvoje (1999) Enhancement of preasymptotic effects in inclusive beauty decays. Physics Letters B, 469 (1-4). pp. 253-258. ISSN 0370-2693

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Abstract

We extend Voloshin's recent analysis of charmed and beauty hyperon decays based on SU(3) symmetry and heavy quark effective theory, by introducing a rather moderate model-dependence, in order to obtain more predictive power, e.g. the values of lifetimes of the (Lambda(b), Xi(b)) hyperon triplet and the lifetime of Omega(b). In this way we obtain an improvement of the ratio tau(Lambda(b))/tau(B-d(0)) similar to 0.9 and the hierarchy of lifetimes tau(Lambda(b)) similar or equal to tau(Xi(b)(0)) < tau(Xi(b)(-)) < tau(Omega(b)) with lifetimes of Xi(b)(-) and Omega(b) exceeding the lifetime of Lambda(b) by 22% and 35%, respectively.

Item Type:	Article
Uncontrolled Keywords:	charmed baryons; lifetimes
Subjects:	NATURAL SCIENCES > Physics
Divisions:	Theoretical Physics Division
Projects:	Project title Project leader Project code Project type Teorijska istraživanja osobina fundamentalnih čestica Guberina, Branko 00980102 MZOS
Depositing User:	Blaženka Melić
Date Deposited:	02 Oct 2013 12:11
URI:	http://fulir.irb.hr/id/eprint/715
DOI:	10.1016/S0370-2693(99)01198-3

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