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Enhancement of preasymptotic effects in inclusive beauty decays


Guberina, Branko; Melić, Blaženka; Štefančić, Hrvoje
Enhancement of preasymptotic effects in inclusive beauty decays // Physics letters B, 469 (1999), 1-4; 253-258 doi:10.1016/S0370-2693(99)01198-3 (međunarodna recenzija, članak, znanstveni)


Naslov
Enhancement of preasymptotic effects in inclusive beauty decays

Autori
Guberina, Branko ; Melić, Blaženka ; Štefančić, Hrvoje

Izvornik
Physics letters B (0370-2693) 469 (1999), 1-4; 253-258

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Beauty baryons; lifetimes; inclusive decays; four-quark operators

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
00980102

Ustanove
Institut "Ruđer Bošković", Zagreb

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


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