ISSN - 00319007, EISSN - 10797114, Physical Review Letters, 2002, vol. 88, p. 218011-218016
Observation of the decay B → Kl+l-
A report on the first observation of the flavor-changing neutral current decay B→ K L+ L- was presented. Assumption of equal charged and neutral B meson pair production was done in calculating the branching fraction. The results showed electroweak penguin decay B→ Kl+l-. The obtained branching fractions could be used to constrain constributions in the Wilson coefficients C9 eff and C10.