# Measurements of forward-backward asymmetry in B --\> K\* l+ l- and evidence of B- --\> tau- anti-nu

Source: [Measurements of forward-backward asymmetry in B --\> K\* l+ l- and evidence of B- --\> tau- anti-nu](<https://www.sota2.com/research/paper/68fa3a4c1e209131ce8c99b1>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-24T23:59:39.870Z

Authors: K. Ikado

Published: 2006-05-16T07:12:23.000Z

## Abstract

We report the first measurement of the forward-backward asymmetry and the ratios of Wilson coefficients in B --\> K\* l+ l- using 386 million BBbar pairs that were collected on the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We also present the first evidence of the decay B- --\> tau- nu\_tau-bar using 414 fb^-1 of data.

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/hep-ex/0605067>)

[PDF](<https://arxiv.org/pdf/hep-ex/0605067.pdf>)