Evidence for an Excess of B̅ →D[superscript (*)]τ[superscript -]ν̅ [subscript τ] Decays
Name
Lees-2012-Evidence for an excess of.pdf
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Author(s)
Dujmic, Denis
Sciolla, Gabriella
Cowan, Ray F
Date Issued
September 2012
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Lees, J. et al. “Evidence for an Excess of [bar over B]→D[superscript (*)][bar over T][bar over v][subscript T] Decays.” Physical Review Letters 109.10 (2012).
Version
Final published version
Abstract
Based on the full BABAR data sample, we report improved measurements of the ratios R(D[superscript(*)])=B(B̅→D[superscript (*)][bar over τ]ν̅[subscript τ])/B(B̅→D[superscript (*)]ℓ[subscript bar over ℓ]ν̅[subscript 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.
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.109.101802
