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http://hdl.handle.net/2445/132915
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DC Field | Value | Language |
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dc.contributor.author | Garra Ticó, Jordi | - |
dc.contributor.author | Graugés Pous, Eugeni | - |
dc.contributor.author | BABAR Collaboration | - |
dc.date.accessioned | 2019-05-09T10:42:50Z | - |
dc.date.available | 2019-05-09T10:42:50Z | - |
dc.date.issued | 2012-09-06 | - |
dc.identifier.issn | 0031-9007 | - |
dc.identifier.uri | http://hdl.handle.net/2445/132915 | - |
dc.description.abstract | Based on the full BABAR data sample, we report improved measurements of the ratios R ( D ( * ) ) = B ( ¯¯¯ B → D ( * ) τ − ¯ ν τ ) / B ( ¯¯¯ B → D ( * ) ℓ − ℓ ¯ 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 2.0 σ and 2.7 σ , respectively. Taken together, our results disagree with these expectations at the 3.4 σ level. This excess cannot be explained by a charged Higgs boson in the type II two-Higgs-doublet model. | - |
dc.format.extent | 8 p. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | American Physical Society | - |
dc.relation.isformatof | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.109.101802 | - |
dc.relation.ispartof | Physical Review Letters, 2012, vol. 109, num. 10, p. 101802 | - |
dc.relation.uri | https://doi.org/10.1103/PhysRevLett.109.101802 | - |
dc.rights | (c) American Physical Society, 2012 | - |
dc.source | Articles publicats en revistes (Física Quàntica i Astrofísica) | - |
dc.subject.classification | Física de partícules | - |
dc.subject.classification | Experiments | - |
dc.subject.other | Particle physics | - |
dc.subject.other | Experiments | - |
dc.title | Evidence for an Excess of ¯¯¯B→D(*)τ−¯ντ Decays | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 654971 | - |
dc.date.updated | 2019-05-09T10:42:50Z | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
Files in This Item:
File | Description | Size | Format | |
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654971.pdf | 631.57 kB | Adobe PDF | View/Open |
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