2004/04/30 by A. Giri, A. K. Giri, R. Mohanta +1 · 9 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Branching fraction #Electroweak interaction #Factorization #Gauge boson #Gauge theory #Minimal Supersymmetric Standard Model #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Standard Model (mathematical formulation) #Supersymmetry #Technicolor #hep-ph
paper · pdf · doi:10.1016/j.physletb.2004.04.086
published in Physics Letters B 594(1-2), 196-204 (Elsevier BV) · Latex, 12 pages, references added, to appear in Phys. Lett. B
arxiv created 2004/05/01 · openalex publication_date 2004/06/17 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We analyze the rare decay mode B → ϕπ, which is a pure penguin induced process, receiving dominant contribution from the electroweak penguins. Thus the standard model branching ratio is expected to be very small, which makes it as a sensitive probe of new physics. Using QCD factorization approach, we find the branching ratio in the standard model as Br(B- → ϕπ-)≃ 5 × 10-9. Exploring some of the beyond standard model scenarios the branching ratio is found to be ∼ \cal O(10-8) in the minimal supersymmetric standard model (MSSM) with mass insertion approximation and in the extended technicolor model (TC2). The existence of an extra vector-like down quark (VLDQ) model predicts it to be ∼ \cal O(10-7). The recent BaBar result on B0 → ϕπ0 might be a strong indication of new physics effect present in the penguin induced process B → ϕπ.