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Evidence for an Excess of B[over ¯]→D^{(*)}τ^{-}ν[over ¯]_{τ} Decays
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(2012) Evidence for an Excess of B[over ¯]→D^{(*)}τ^{-}ν[over ¯]_{τ} Decays. Physical Review Letters, Vol.109 (No.10). Article no. 101802. doi:10.1103/PhysRevLett.109.101802 ISSN 0031-9007.
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Official URL: http://dx.doi.org/10.1103/PhysRevLett.109.101802
Abstract
Based on the full BABAR data sample, we report improved measurements of the ratios R(D(*))=B(B̅ →D(*)τ-ν̅ τ)/B(B̅ →D(*)ℓℓ-ν̅ ℓ), where ℓ is either e or μ. These ratios are sensitive to new physics contributions in the form of a charged Higgs boson. We measure R(D)=0.440±0.058±0.042 and R(D*)=0.332±0.024±0.018, which exceed the standard model expectations by 2.0σ and 2.7σ, respectively. Taken together, our results disagree with these expectations at the 3.4σ level. This excess cannot be explained by a charged Higgs boson in the type II two-Higgs-doublet model.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Journal or Publication Title: | Physical Review Letters | ||||
| Publisher: | American Physical Society | ||||
| ISSN: | 0031-9007 | ||||
| Official Date: | 2012 | ||||
| Dates: |
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| Volume: | Vol.109 | ||||
| Number: | No.10 | ||||
| Page Range: | Article no. 101802 | ||||
| DOI: | 10.1103/PhysRevLett.109.101802 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access |
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