Observation of the Decay [Formula presented]
Journal
Physical Review Letters
Journal Volume
88
Journal Issue
2
Pages
6-
Date Issued
2002
Author(s)
Kawamura, N. et al.
Yuta, H.
Aulchenko, V.
Bondar, A.
Eidelman, S.
Garmash, A.
Krokovny, P.
Kuzmin, A.
Root, N.
Schwartz, B.
Zhilich, V.
Abstract
We report a search for the flavor-changing neutral current decay B-->K(*)l+l- using a 29.1 fb(-1) data sample accumulated at the Upsilon(4S) resonance with the Belle detector at the KEKB e+e- storage ring. We observe the decay process B-->Kl+l-(l = e, mu), for the first time, with a branching fraction of B(B-->Kl+l-) = (0.75(+0.25)(-0.21)+/-0.09)x10(-6).
Type
journal article