Measurement of forward-backward asymmetry and Wilson coefficients in B --> K*l+l-.
نویسندگان
چکیده
We report the first measurement of the forward-backward asymmetry and the ratios of Wilson coefficients and in A9/A7 and A10/A7 in B --> K*l+l-, where l represents an electron or a muon. We find evidence for the forward-backward asymmetry with a significance of 3.4sigma. The results are obtained from a data sample containing 386 x 10(6) BB pairs that were collected on the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider.
منابع مشابه
6 M ay 2 00 6 MEASUREMENT OF FORWARD - BACKWARD ASYMMETRY IN
We report the first measurement of the forward-backward asymmetry and the ratios of Wilson coefficients in B → K * ℓ + ℓ − , using 386 ×10 6 B ¯ B pairs that were collected on the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e + e − collider. We also present the first evidence of the decay B − → τ − ¯ ντ , using 414 fb −1 of data.
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عنوان ژورنال:
- Physical review letters
دوره 96 25 شماره
صفحات -
تاریخ انتشار 2006