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|
Bibliographical noteFunding Information:
We thank M. Drees and T. Morozumi for the careful reading of the manuscript and their valuable comments. The work of T.A. and M.S. was supported by TUBITAK. C.S.K. wishes to acknowledge the financial support of Korea Research Foundation made in the program year of 1997.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics