Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/133455
Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Abellan Beteta, Carlos | - |
dc.contributor.author | Calvo Gómez, Míriam | - |
dc.contributor.author | Camboni, Alessandro | - |
dc.contributor.author | Comerma Montells, Albert | - |
dc.contributor.author | Domingo Bonal, Francesc | - |
dc.contributor.author | Garrido Beltrán, Lluís | - |
dc.contributor.author | Grabalosa Gándara, Marc | - |
dc.contributor.author | Graciani Díaz, Ricardo | - |
dc.contributor.author | Graugés Pous, Eugeni | - |
dc.contributor.author | López Asamar, Elias | - |
dc.contributor.author | Pérez-Calero Yzquierdo, Antonio | - |
dc.contributor.author | Picatoste Olloqui, Eduardo | - |
dc.contributor.author | Potterat, Cédric | - |
dc.contributor.author | Rives Molina, Vicente José | - |
dc.contributor.author | Ruiz, Hugo (Ruiz Pérez) | - |
dc.contributor.author | Vázquez Gómez, Ricard | - |
dc.contributor.author | Vilasis-Cardona, Xavier | - |
dc.contributor.author | LHCb Collaboration | - |
dc.date.accessioned | 2019-05-20T13:50:26Z | - |
dc.date.available | 2019-05-20T13:50:26Z | - |
dc.date.issued | 2013-01-07 | - |
dc.identifier.issn | 0031-9007 | - |
dc.identifier.uri | http://hdl.handle.net/2445/133455 | - |
dc.description.abstract | A search for the rare decays B 0 s → μ + μ − and B 0 → μ + μ − is performed with data collected in 2011 and 2012 with the LHCb experiment at the Large Hadron Collider. The data samples comprise 1.1 fb − 1 of proton-proton collisions at √ s = 8 TeV and 1.0 fb − 1 at √ s = 7 TeV . We observe an excess of B 0 s → μ + μ − candidates with respect to the background expectation. The probability that the background could produce such an excess or larger is 5.3 × 10 − 4 corresponding to a signal significance of 3.5 standard deviations. A maximum-likelihood fit gives a branching fraction of B ( B 0 s → μ + μ − ) = ( 3.2 + 1.5 − 1.2 ) × 10 − 9 , where the statistical uncertainty is 95% of the total uncertainty. This result is in agreement with the standard model expectation. The observed number of B 0 → μ + μ − candidates is consistent with the background expectation, giving an upper limit of B ( B 0 → μ + μ − ) < 9.4 × 10 − 10 at 95% confidence level. | - |
dc.format.extent | 9 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.110.021801 | - |
dc.relation.ispartof | Physical Review Letters, 2013, vol. 110, num. 2, p. 021801 | - |
dc.relation.uri | https://doi.org/10.1103/PhysRevLett.110.021801 | - |
dc.rights | cc by (c) CERN; LHCb Collaboration, 2013 | - |
dc.rights.uri | http://creativecommons.org/licenses/by/3.0/es/ | - |
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 | First Evidence for the Decay B0s→μ+μ− | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 619648 | - |
dc.date.updated | 2019-05-20T13:50:26Z | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Enginyeria Electrònica i Biomèdica) Articles publicats en revistes (Física Quàntica i Astrofísica) Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
619648.pdf | 276.23 kB | Adobe PDF | View/Open |
This item is licensed under a Creative Commons License