Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/132915
Title: | Evidence for an Excess of ¯¯¯B→D(*)τ−¯ντ Decays |
Author: | Garra Ticó, Jordi Graugés Pous, Eugeni BABAR Collaboration |
Keywords: | Física de partícules Experiments Particle physics Experiments |
Issue Date: | 6-Sep-2012 |
Publisher: | American Physical Society |
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. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.109.101802 |
It is part of: | Physical Review Letters, 2012, vol. 109, num. 10, p. 101802 |
URI: | http://hdl.handle.net/2445/132915 |
Related resource: | https://doi.org/10.1103/PhysRevLett.109.101802 |
ISSN: | 0031-9007 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
654971.pdf | 631.57 kB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.