Study ofB¯→Λp¯ρ(ϕ)andB¯<

Abstract

We examine the three-body baryonic " B ! B " B 0 V decays with V vector mesons in the standard model. We can simultaneously explain the recent experimental data on the decays of B À ! Ã " p 0 and " B ! Ã "Ã " K Ã based on the QCD counting rules and SUð3Þ flavor symmetry. We also predict that the decay branching ratios of " B 0 ! Ã " p þ and B À ! Ã " p are 3.0 and 1:5 Â 10 À6 , respectively, which are promising to be observed by BELLE and BABAR at the B factories.

Observation of B+→pΛ¯K+K− and Lu1, Wang2, Chistov3 et al. 2019Phys. Rev. D

“…to obtain the results listed in Table III. The measured branching fractions of four-body decay of B þ → pΛK þ K − and B þ → pΛϕ are consistent with theoretical predictions [12,13]. Note that BðB þ → pΛK þ K − Þ is compatible with BðB þ → pΛπ þ π − Þ [27].…”

“…It is clear that further studies of baryonic B decays are needed in order to improve theoretical understanding. In this paper, we report measurements of B þ → pΛK þ K − and B þ →pΛK þ K þ , for which theoretical predictions of BðB þ → pΛK þ K − Þ [12] and BðB þ → pΛϕÞ [13] are available.…”

Search for the rare decay $B^- \to \Lambda \bar{p} \nu \bar{\nu}$

“…Such decays are heavily suppressed in the Standard Model and appear, at lowest order, at the one-loop level. The predicted branching fraction in the Standard Model is B(B − → Λ pνν) = (7.9 ± 1.9) × 10 −7 [1].…”

Baryonic $b \rightarrow s\,l\bar{l}$ transition decays

“…However, for a two body decay, the invariant mass of the baryon-antibaryon pair is M B and hence these decay modes are not preferred. Several theoretical approaches have been proposed to explain the threshold enhancement in the dibaryon invariant mass distribution [30][31][32][33][34][35][36][37][38][39][40][41][42][43]. In principle, the threshold enhancement mechanism can be very easily understood in terms of a simple short distance picture [44].…”