Exclusive B -> Ml(+)l(-) (M = pi, K, rho, K*) decays and determinations of vertical bar V-ts vertical bar (and vertical bar V-td/V-ts vertical bar)

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Aliev T., Kim C., Savci M.

PHYSICS LETTERS B, vol.441, pp.410-418, 1998 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 441
  • Publication Date: 1998
  • Doi Number: 10.1016/s0370-2693(98)01168-x
  • Journal Name: PHYSICS LETTERS B
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.410-418
  • Middle East Technical University Affiliated: Yes


We examine the possibility for precise determination of /V-ts/ (and /V-td/V-ts/) from the exclusive decays, B --> Kl(+)l(-), B --> K*l(+)l(-) (and B --> pi l(+)l(-), B --> rho l(+)l(-)). We show that the ratio /V-ts/ can be extracted experimentally with a small theoretical uncertainty from hadronic form-factors, if we appropriately constrain kinematical regions of q(2). We also give detailed analytical and numerical results on the differential decay width d Gamma(B --> K*l(+)l(-))/dq(2), and the ratios of integrated branching fractions, B(B --> rho l(+)l(-))/B(B --> K*l(+)l(-)). We estimate that one can determine the ratio /V-ts/ from those decays within theoretical accuracy of similar to 10%. (C) 1998 Elsevier Science B.V. All rights reserved.