1993/07/05 by Dongsheng Du, Zhi‐zhong Xing, Zhi-zhong Xing · 2 citations
Physics and Astronomy · #Neutrino Physics Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1016/0370-2693(93)90510-o
published as Phys.Lett.B312:199-204,1993 · 14 pages (Latex, 2 figures available), BIHEP-TH-93-25 (accepted for publication in Phys. Lett. B)
arxiv created 1993/07/05 · openalex publication_date 1993/08/01 · arxiv updated 2010/11/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
A careful quark-diagram analysis shows that a number of two-body nonleptonic B decays can occur through the so-called hairpin diagram, a QCD loop-induced graph different from penguin in final-state hadronization of valence quarks. Using the two-loop renormalization-group-improved effective Hamiltonian and the naive factorization approximation, we demonstrate the effect of the hairpin diagram on decay rates and CP asymmetries for a few interesting channels such as B0d,B0d → ψKS and B±u→ ϕK±. Branching ratios of some pure hairpin decay modes, e.g., B-u→ ϕπ-,ϕρ- and B0d→ ϕπ0,ϕρ0, ϕω, ϕη, etc., are estimated to be on the order of 10-7.