Three-body baryonic B? → Λp?π decays and such
Journal
European Physical Journal C
Journal Volume
65
Journal Issue
3
Pages
27-35
Date Issued
2002
Author(s)
Chua, C.-K.
Abstract
We study the decay rates and spectra of B̄ → Λp̄π, Σ0p̄π, Σ-n̄π, Ξ0 Σ̄+ π, Ξ- Σ̄0π and Ξ- Λ̄π modes in the factorization approach. The baryon pairs are produced through vector, axial vector, scalar and pseudoscalar operators. Previous predictions, including ours, are an order of magnitude too small compared to experiment. By incorporating QCD counting rules and studying the asymptotic behavior, we find an earlier relation between the pseudoscalar and axial vector form factors to be too restrictive. Instead, the pseudoscalar and scalar form factors are related asymptotically. Following this approach, the measured Λp̄π+ rate (∼ 4.0 × 10-6) and spectrum can be understood, and Λ should be dominantly left-hand polarized, while we expect ℬ(Σ0 p̄π+) ≃ 1.6 × 10-6. These results and other predictions can be checked soon.
Type
journal article