Study of the Suppressed Decays B^± → [K^∓ π^±]_D K^± and B^± → [K^∓ π^±]_D π^± at Belle

2005/08/24 by K. Abe, Abe, K.
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.hep-ex/0508048

openalex publication_date 2005/08/24 · openalex created_date 2024/04/11 · openalex updated_date 2026/07/28

Abstract

We report an updated study of the suppressed decays B^- → [K⁺π^-]_D K^- and B^- → [K⁺π^-]_D π^- where [K⁺π^-]_D indicates that the K⁺π^- pair originates from a neutral D meson. A data sample containing 386 million BB pairs recorded at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric e⁺e^- storage ring is used. This decay mode is sensitive to the CKM angle ϕ₃. We do not see a significant signal for B^- → [K⁺π^-]_D K^-, and we set a limit on the ratio of B decay amplitudes r_B < 0.18 at the 90% confidence level. We measure the CP asymmetry of the B^- → [K⁺π^-]_D π^- mode, \cal A_Dπ = 0.10 ± 0.22 (stat) ± 0.02 (syst).

Related

• Study of the Suppressed Decays B^± →[K^∓π^±]_DK^± at Belle
• Study of charmless decays B^± → K⁰_S K⁰_S h^± (h=K,π) at Belle
• Measurements of branching fraction and CP asymmetry of the B⁰(B⁰)→ K⁰_SK^∓π^± decay at Belle
• First measurements of the ϕ₃-sensitive decay B^± → D(K_{\rm S}⁰ π⁺ π^- π⁰) K^± with Belle
• Recent Belle results related to π-K interactions