We examine the possibility for precise determination of |Vts| (and |Vtd/Vts\) from the exclusive decays, B → Kℓ+ℓ-, B → K * ℓ+ℓ- (and B → π ℓ+ℓ-, B → ρℓ+ℓ-). 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+ℓ-)/dq2, and the ratios of integrated branching fractions, ℬ(B → ρℓ+ℓ-)/ℬ(B → K * ℓ+ℓ-). We estimate that one can determine the ratio |Vts\ from those decays within theoretical accuracy of ∼ 10%.
|Number of pages||9|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|Publication status||Published - 1998 Nov 26|
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics