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http://hdl.handle.net/2445/131157
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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 | 2019-04-01T12:36:08Z | - |
dc.date.available | 2019-04-01T12:36:08Z | - |
dc.date.issued | 2012-08-01 | - |
dc.identifier.issn | 1550-7998 | - |
dc.identifier.uri | http://hdl.handle.net/2445/131157 | - |
dc.description.abstract | We present searches for the rare decay modes D 0 → e + e − , D 0 → μ + μ − , and D 0 → e ± μ ∓ in continuum e + e − → c ¯ c events recorded by the BABAR detector in a data sample that corresponds to an integrated luminosity of 468 fb − 1 . These decays are highly Glashow-Iliopoulos-Maiani suppressed but may be enhanced in several extensions of the standard model. Our observed event yields are consistent with the expected backgrounds. An excess is seen in the D 0 → μ + μ − channel, although the observed yield is consistent with an upward background fluctuation at the 5% level. Using the Feldman-Cousins method, we set the following 90% confidence level intervals on the branching fractions: B ( D 0 → e + e − ) < 1.7 × 10 − 7 , B ( D 0 → μ + μ − ) within [ 0.6 , 8.1 ] × 10 − 7 , and B ( D 0 → e ± μ ∓ ) < 3.3 × 10 − 7 . | - |
dc.format.extent | 10 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/PhysRevD.86.032001 | - |
dc.relation.ispartof | Physical Review D, 2012, vol. 86, num. 3, p. 32001 | - |
dc.relation.uri | https://doi.org/10.1103/PhysRevD.86.032001 | - |
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 | Search for the decay modes D0 → e+e−, D0 → μ+μ−, and D0 → e±μ∓ | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 654969 | - |
dc.date.updated | 2019-04-01T12:36:09Z | - |
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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654969.pdf | 300.46 kB | Adobe PDF | View/Open |
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