Measurement of an excess of [¯ over B] → D[superscript (*)]τ[superscript -]ν[¯ over v][subscript τ] decays and implications for charged Higgs bosons
Based on the full BABAR data sample, we report improved measurements of the ratios R(D) = B([¯ over B] → D[subscript τ][superscript −][¯ over v][subscript τ])/B([¯ over B] → Dℓ[superscript −][¯ over v]ℓ) and R(D[superscript *]) = B([¯ over B] → D[superscript *]τ[superscript −][¯ over v][subscript τ]...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
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American Physical Society
2014
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| Online Access: | http://hdl.handle.net/1721.1/84712 |
| _version_ | 1811072590444232704 |
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| author | Sciolla, Gabriella Flood, Kevin T. Cowan, Ray F Dujmic, Denis |
| author2 | Massachusetts Institute of Technology. Laboratory for Nuclear Science |
| author_facet | Massachusetts Institute of Technology. Laboratory for Nuclear Science Sciolla, Gabriella Flood, Kevin T. Cowan, Ray F Dujmic, Denis |
| author_sort | Sciolla, Gabriella |
| collection | MIT |
| description | Based on the full BABAR data sample, we report improved measurements of the ratios R(D) = B([¯ over B] → D[subscript τ][superscript −][¯ over v][subscript τ])/B([¯ over B] → Dℓ[superscript −][¯ over v]ℓ) and R(D[superscript *]) = B([¯ over B] → D[superscript *]τ[superscript −][¯ over v][subscript τ])/B([¯ over B] → D[superscript *]ℓ[superscript −][¯ over v][subscript 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[superscript *]) = 0.332 ± 0.024 ± 0.018, which exceed the standard model expectations by 2.0σ and 2.7σ, respectively. Taken together, the 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. 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. |
| first_indexed | 2024-09-23T09:08:26Z |
| format | Article |
| id | mit-1721.1/84712 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T09:08:26Z |
| publishDate | 2014 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/847122023-02-26T04:08:34Z Measurement of an excess of [¯ over B] → D[superscript (*)]τ[superscript -]ν[¯ over v][subscript τ] decays and implications for charged Higgs bosons Sciolla, Gabriella Flood, Kevin T. Cowan, Ray F Dujmic, Denis Massachusetts Institute of Technology. Laboratory for Nuclear Science Cowan, Ray Franklin Dujmic, D. Sciolla, Gabriella Flood, Kevin T. Based on the full BABAR data sample, we report improved measurements of the ratios R(D) = B([¯ over B] → D[subscript τ][superscript −][¯ over v][subscript τ])/B([¯ over B] → Dℓ[superscript −][¯ over v]ℓ) and R(D[superscript *]) = B([¯ over B] → D[superscript *]τ[superscript −][¯ over v][subscript τ])/B([¯ over B] → D[superscript *]ℓ[superscript −][¯ over v][subscript 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[superscript *]) = 0.332 ± 0.024 ± 0.018, which exceed the standard model expectations by 2.0σ and 2.7σ, respectively. Taken together, the 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. 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. United States. Dept. of Energy National Science Foundation (U.S.) Alfred P. Sloan Foundation 2014-02-10T13:25:24Z 2014-02-10T13:25:24Z 2013-10 2013-03 Article http://purl.org/eprint/type/JournalArticle 1550-7998 1550-2368 http://hdl.handle.net/1721.1/84712 Lees, J. P., V. Poireau, V. Tisserand, E. Grauges, A. Palano, G. Eigen, B. Stugu, et al. “Measurement of an excess of [¯ over B] → D[superscript (*)]τ[superscript -]ν[¯ over v][subscript τ] decays and implications for charged Higgs bosons.” Physical Review D 88, no. 7 (October 2013). © 2013 American Physical Society en_US http://dx.doi.org/10.1103/PhysRevD.88.072012 Physical Review D 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. application/pdf American Physical Society American Physical Society |
| spellingShingle | Sciolla, Gabriella Flood, Kevin T. Cowan, Ray F Dujmic, Denis Measurement of an excess of [¯ over B] → D[superscript (*)]τ[superscript -]ν[¯ over v][subscript τ] decays and implications for charged Higgs bosons |
| title | Measurement of an excess of [¯ over B] → D[superscript (*)]τ[superscript -]ν[¯ over v][subscript τ] decays and implications for charged Higgs bosons |
| title_full | Measurement of an excess of [¯ over B] → D[superscript (*)]τ[superscript -]ν[¯ over v][subscript τ] decays and implications for charged Higgs bosons |
| title_fullStr | Measurement of an excess of [¯ over B] → D[superscript (*)]τ[superscript -]ν[¯ over v][subscript τ] decays and implications for charged Higgs bosons |
| title_full_unstemmed | Measurement of an excess of [¯ over B] → D[superscript (*)]τ[superscript -]ν[¯ over v][subscript τ] decays and implications for charged Higgs bosons |
| title_short | Measurement of an excess of [¯ over B] → D[superscript (*)]τ[superscript -]ν[¯ over v][subscript τ] decays and implications for charged Higgs bosons |
| title_sort | measurement of an excess of ¯ over b d superscript τ superscript ν ¯ over v subscript τ decays and implications for charged higgs bosons |
| url | http://hdl.handle.net/1721.1/84712 |
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