Evidence for an excess of B̄ → D^(*)_τ⁻ ν̅_τ decays

dc.contributor.ORCID56366505900 (Lou, X)en_US
dc.contributor.VIAF250674117 (Izen, JM)en_US
dc.contributor.VIAF250674117 (Izen, JM)
dc.contributor.authorLees, J. P.en_US
dc.contributor.authorPoireau, V.en_US
dc.contributor.authorTisserand, V.en_US
dc.contributor.authorGarra Tico, J.en_US
dc.contributor.authorGrauges, E.en_US
dc.contributor.authorPalano, A.en_US
dc.contributor.authorEigen, G.en_US
dc.contributor.authorIzen, Joseph M.en_US
dc.contributor.authorLou, Xinchouen_US
dc.contributor.authorBaBar Collaborationen_US
dc.contributor.utdAuthorLou, Xinchouen_US
dc.contributor.utdAuthorIzen, Joseph M.en_US
dc.date.accessioned2014-03-19T19:17:18Z
dc.date.available2014-03-19T19:17:18Z
dc.date.created2012-09-06en_US
dc.date.issued2012-09-06en_US
dc.description.abstractBased on the full BABAR data sample, we report improved measurements of the ratios R(D^( *) = ℬ(B̄→D^( *)τ -ν {̄τ}) / ℬ(B̄→D^( *)ℓe̅ν ̅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.en_US
dc.identifier.bibliographicCitationLees, J. P., V. Poireau, V. Tisserand, J. Garra Tico, et al. 2012. "Evidence for an excess of B̄ → D^(*)_τ⁻ ν̅_τ decays." Physical Review Letters 109(10), doi:http://dx.doi.org/10.1103/PhysRevLett.109.101802en_US
dc.identifier.issn0031-9007en_US
dc.identifier.issue10en_US
dc.identifier.urihttp://hdl.handle.net/10735.1/3170
dc.identifier.volume109en_US
dc.language.isoen_USen_US
dc.publisherAmer Physical Socen_US
dc.relation.urihttp://dx.doi.org/10.1103/PhysRevLett.109.101802
dc.rights©2012 American Physical Societyen_US
dc.sourcePhysical Review Letters
dc.subjectHiggs bosonsen_US
dc.subjectPhysicsen_US
dc.subjectB mesons--Decayen_US
dc.titleEvidence for an excess of B̄ → D^(*)_τ⁻ ν̅_τ decaysen_US
dc.typeTexten_US
dc.type.genreArticleen_US

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