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Measurement of an excess of (B)over-bar -> D-(*) tau(-)(v)over-bar(tau) decays and implications for charged Higgs bosons

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Measurement of an excess of (B)over-bar -> D-(*) tau(-)(v)over-bar(tau) decays and implications for charged Higgs bosons

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dc.contributor.author BABAR Collaboration
dc.contributor.author Martínez Vidal, Fernando
dc.contributor.author Oyanguren Campos, Arantza
dc.contributor.author Villanueva Pérez, Pablo
dc.date.accessioned 2014-04-01T11:56:09Z
dc.date.available 2014-04-01T11:56:09Z
dc.date.issued 2013
dc.identifier.citation BABAR Collaboration Martínez Vidal, Fernando Oyanguren Campos, Arantza Villanueva Pérez, Pablo 2013 Measurement of an excess of (B)over-bar -> D-(*) tau(-)(v)over-bar(tau) decays and implications for charged Higgs bosons Physical Review D 88 7 072012-1 072012-30
dc.identifier.uri http://hdl.handle.net/10550/33951
dc.description.abstract Based on the full BABAR data sample, we report improved measurements of the ratios R(D) = B((B) over bar -> D tau(-)(v) over bar (tau))/B((B) over bar -> Dl(-)(v) over bar (l)) and R(D*) = B((B) over bar -> D*tau(-)(v) over bar (tau))/B((B) over bar -> D*l(-)(v) over bar (l)), where l refers to either an electron or muon. 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 2.0 sigma and 2.7 sigma, respectively. Taken together, the results disagree with these expectations at the 3.4 sigma level. This excess cannot be explained by a charged Higgs boson in the type II two-Higgs-doublet model. Kinematic distributions presented here exclude large portions of the more general type III two-Higgs-doublet model, but there are solutions within this model compatible with the results.
dc.relation.ispartof Physical Review D, 2013, vol. 88, num. 7, p. 072012-1-072012-30
dc.subject Física nuclear
dc.title Measurement of an excess of (B)over-bar -> D-(*) tau(-)(v)over-bar(tau) decays and implications for charged Higgs bosons
dc.type journal article es_ES
dc.date.updated 2014-04-01T11:56:09Z
dc.identifier.doi 10.1103/PhysRevD.88.072012
dc.identifier.idgrec 093362
dc.rights.accessRights open access es_ES
dc.identifier.url 10.1103/PhysRevD.88.072012

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