Measurement of Forward-Backward Asymmetry and Wilson Coefficients in B ---> K* l+ l-
Journal
Physical Review Letters
Journal Volume
96
Pages
251801
Date Issued
2006-03
Author(s)
Abstract
We report the first measurement of the forward-backward asymmetry and the ratios of Wilson coefficients A9/A7 and A10/A7 in Bâ†' K*â.,"+â.,"-, where â.," represents an electron or a muon. We find evidence for the forward-backward asymmetry with a significance of 3.4Ï. The results are obtained from a data sample containing 386 106†â€BB pairs that were collected on the Î¥(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. © 2006 The American Physical Society.
Type
journal article