ISSN - 00319007, EISSN - 10797114, Physical Review Letters, 2003, vol. 91, p. 221802/1-221802/7
Evidence for the rare decay B → K*ℓ+ℓ- and measurement of the B → Kℓ+ℓ- branching fraction
Data collected with the BABAR detector at the PEP-II storage ring at the Stanford Linear Accelerator Center were analyzed. Signals were observed for Β→Kℓ+ℓ-, averaged over lepton type (e+e- and μ+μ-) and Β charge. Furthermore, first evidence for Β→ K*ℓ+ℓ-, similarly averaged was obtained.