Evidence for an Excess of B̄→D(*)τ⁻ν̄τ Decays
Journal Article
·
· Physical Review Letters
Based on the full BABAR data sample, we report improved measurements of the ratios R(D(*))=B(B̄→D(*)τ⁻ν¯τ)/B(B̄→D(*)ll¯ν¯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.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 1103278
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Vol. 109 Journal Issue: 10; ISSN 0031-9007
- Publisher:
- American Physical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 63 works
Citation information provided by
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