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dc.contributor.authorAaltonen, Timo Antero
dc.contributor.authorAmerio, Silvia
dc.contributor.authorAmidei, Dante
dc.contributor.authorAnastassov, Anton
dc.contributor.authorAnnovi, Alberto
dc.contributor.authorAntos, Jaroslav
dc.contributor.authorApollinari, Giorgio
dc.contributor.authorAppel, Jeffrey A.
dc.contributor.authorCasal Laraña, Bruno
dc.contributor.authorCuevas Maestro, Francisco Javier
dc.contributor.authorGómez Gramuglio, Gervasio
dc.contributor.authorPalencia Cortezón, Enrique
dc.contributor.authorRodrigo Anoro, Teresa 
dc.contributor.authorRuiz Jimeno, Alberto 
dc.contributor.authorScodellaro, Luca
dc.contributor.authorVila Álvarez, Iván
dc.contributor.authorVilar Cortabitarte, Rocío 
dc.contributor.authorVizán García, Jesús Manuel
dc.contributor.authorApresyan, Artur
dc.contributor.authorÁlvarez González, Bárbara
dc.contributor.otherUniversidad de Cantabriaes_ES
dc.date.accessioned2013-05-21T11:25:12Z
dc.date.available2013-05-21T11:25:12Z
dc.date.issued2011-11-17
dc.identifier.issn0031-9007
dc.identifier.issn1079-7114
dc.identifier.urihttp://hdl.handle.net/10902/2144
dc.description.abstractReceived 10 July 2011; published 1 November 2011; corrected 17 November 2011 A search has been performed for Bs0→μ+μ- and B0→μ+μ- decays using 7  fb-1 of integrated luminosity collected by the CDF II detector at the Fermilab Tevatron collider. The observed number of B0 candidates is consistent with background-only expectations and yields an upper limit on the branching fraction of B(B0→μ+μ-)<6.0×10-9 at 95% confidence level. We observe an excess of Bs0 candidates. The probability that the background processes alone could produce such an excess or larger is 0.27%. The probability that the combination of background and the expected standard model rate of Bs0→μ+μ- could produce such an excess or larger is 1.9%. These data are used to determine B(Bs0→μ+μ-)= (1.8-0.9+1.1)×10-8 and provide an upper limit of B(Bs0→μ+μ-)<4.0×10-8 at 95% confidence level.es_ES
dc.format.extent7 p.es_ES
dc.language.isoenges_ES
dc.publisherAmerican Physical Societyes_ES
dc.rights© 2011 American Physical Societyes_ES
dc.sourcePhysical Review Letters, volo. 107, iss. 19, art. num. 191801 (2011)es_ES
dc.titleSearch for Bs0→μ+μ- and B0→μ+μ- Decays with CDF IIes_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.relation.publisherVersionhttp://dx.doi.org/10.1103/PhysRevLett.107.191801
dc.rights.accessRightsopenAccesses_ES
dc.identifier.DOI10.1103/PhysRevLett.107.191801
dc.type.versionpublishedVersiones_ES


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