Weak decays of doubly heavy baryons: Decays to a system of π mesons

Abstract

In the presented article we consider exclusive weak decays of doubly heavy baryons with spin J = 1/2 with production of leptonic pair or a set of light mesons. Using QCD factorization theorem and spectral functions approach we obtain theoretical predictions for the partial probabilities of these decays and distributions over various kinematic variables. According to the obtaining results partial probabilities of some of researched decays are large enough to be observed experimentally.

Two-body weak decays of doubly charmed baryons

“…In Table VI we present a complete comparison of the calculated branching fractions of Cabibbofavored B cc → B c + P decays with other works. Only the factorizable contributions from the external W -emission governed by the Wilson coefficient a 1 were considered in references [7,12,14,18] with nonfactorizbale effects being neglected. We see from Table I that only the decay modes Ξ ++ cc → Ξ…”

“…Since B cc → B c transition form factors are largest in LFQM(I) and smallest in QSR (see Table III), this leads to B(Ξ ++ cc → Ξ + c π + ) and B(Ξ + cc → Ξ 0 c π + ) in [12] two times smaller than that in [7], for example. The authors of [14] employed LFQM(I) form factors, but their predictions are slightly larger than that of [7].…”

“…we would like to investigate in this work the nonleptonic two-body decays of doubly charmed baryons Ξ ++ cc , Ξ + cc and Ω + cc . This has been studied intensively in the literature [5][6][7][8][9][10][11][12][13][14][15][16][17][18]. Many authors [7,12,14,18] considered only the factorizable contributions from the external W -emission governed by the Wilson coefficient a 1 .…”

“…This has been studied intensively in the literature [5][6][7][8][9][10][11][12][13][14][15][16][17][18]. Many authors [7,12,14,18] considered only the factorizable contributions from the external W -emission governed by the Wilson coefficient a 1 . It is well known that in charmed baryon decays, nonfactorizable contributions from W -exchange or inner W -emission diagrams play an essential role and they cannot be neglected, in contrast with the negligible effects in heavy meson decays.…”

Mass and decay properties of double heavy baryons with a phenomenological potential model

“…The theoretical studies of weak decays of doubly heavy baryons in the latest three years started from [27] and [28]. According to the factorization theorem, Gerasimov and Luchinsky studied exclusive weak decays of doubly heavy baryons [29]. Masses and magnetic moments of double heavy baryons were studied in the hyper central description of the three-body system [30,31].…”