Exclusive B → Mℓ+-(M = π, K, ρ, K *) decays and determinations of |Vts| (and |Vtd/Vts|)

T. M. Aliev, Choong Sun Kim, M. Savci

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We examine the possibility for precise determination of |Vts| (and |Vtd/Vts\) from the exclusive decays, B → Kℓ+-, B → K * ℓ+- (and B → π ℓ+-, B → ρℓ+-). We show that the ratio |Vts| can be extracted experimentally with a small theoretical uncertainty from hadronic form-factors, if we appropriately constrain kinematical regions of q2. We also give detailed analytical and numerical results on the differential decay width dΓ(B → K * ℓ+-)/dq2, and the ratios of integrated branching fractions, ℬ(B → ρℓ+-)/ℬ(B → K * ℓ+-). We estimate that one can determine the ratio |Vts\ from those decays within theoretical accuracy of ∼ 10%.

Original languageEnglish
Pages (from-to)410-418
Number of pages9
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1-4
Publication statusPublished - 1998 Nov 26


All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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