Nonleptonic charmed-baryon decays:Bc→B(32+,

Abstract

In contrast to the nonleptonic decays of charmed baryons B, -B( i ' + P (0-), where the decay amplitude receives contributions both from the s-channel and u-channel .IP= f' poles and from the factorization term, the Cabibbo-favored decays B, -B( ++, decuplet)+P(O-) or V( 1 -) are much simpler to describe. In general, one finds that either the pole term (we confine ourselves to i ' poles only) or the factorization term contributes, but not both. In this paper we have considered the Cabibbo-favored decays of A:,S:A,STA, and 0:. In the model where only i ' poles are kept, we find that A: and E:A decays receive contributions from s-channel poles only and that 0: decays into B( t+, decuplet)+ P ( 0 -) or V( 1-) through the factorization process only. S: A decays are forbidden. We make numerical estimates of decay rates and the asymmetry parameters. We emphasize that the decays B,-B(++, decuplet) + P(O-) or V ( 1 -) are theoretically "clean" and simple to describe and that data in these decay modes will be very desirable.PACS number(s): 13.30.Eg, 14.20.K~

Charmed baryons circa 2015

“…do not receive factorizable and 1/2 ± pole contributions [100,120]. However, the Σ * +K 0 mode was seen earlier by FOCUS [134], and this may indicate the importance of pole contributions beyond low-lying 1/2 ± intermediate states.…”

“…Various theoretical approaches to weak decays of heavy baryons have been investigated, including the current algebra approach [101][102][103][104][105][106][107][108][109][110][111][112][113][114][115][116][117], factorization scheme, pole model technique [98,[118][119][120][121][122]], relativistic quark model [100,123], and quark diagram scheme [124,125]. Model predictions of the branching fractions and decay asymmetries can be found in Tables VI-VII of [1] for B c → B + P decays, …”

Nonleptonic charmed-baryon decays: Symmetry properties of parity-violating amplitudes

“…[3,2,7]), the change from CA to pole model for parity-violating amplitudes will change the sign and size (in some cases significantly) of the asymmetries of such processes. For the A;-2+.n0 decay, this explains the difference in asymmetry between Refs.…”

“…The first, based on quark diagrams and symmetry principles, was originally attempted by Korner et al [I]. The second, followed by Cheng and Tseng [2] and Xu and Kamal [3], consists in carrying out explicit calculations in the framework of the pole model.…”

Nonleptonic two-body decays of theBcmeson in the light-front quark model and the QCD factorization approach

“…There have been many theoretical efforts to calculate the semileptonic [5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26] and non-leptonic [4,5,6,7,8,9,10,11,12,13,14,15,16,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42] decays of the B c meson. The semileptonic B c decays provide a good opportunity to measure not only the CKM elements such as |V cb |, |V ub |,|V cs | and |V cd ...…”