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Title

Observation of the associated production of a single top quark -and a W boson in pp collisions at √s = 8TeV

AuthorsChatrchyan, S.; Brochero Cifuentes, J. A. ; Cabrillo, I. J. ; Cabrillo, I. J. ; Calderon, Alicia ; Chuang, S. H. ; Duarte Campderros, J. ; Fernández, M. ; Gómez, G. ; González Sánchez, J. ; Graziano, A. ; López Virto, A. ; Marco, Jesús ; Marco, Rafael ; Martínez-Rivero, Celso ; Matorras, Francisco ; Muñoz Sánchez, F. J. ; Piedra, Jonatan ; Rodrigo, Teresa ; Rodríguez Marrero, Ana Y. ; Ruiz Jimeno, Alberto ; Scodellaro, Luca ; Vila, Iván ; Vilar, Rocío ; CMS Collaboration
Issue Date2014
PublisherAmerican Physical Society
CitationPhysical Review Letters 112: 231802 (2014)
AbstractThe first observation of the associated production of a single top quark and a W boson is presented. The analysis is based on a data set corresponding to an integrated luminosity of 12.2fb-1 of proton-proton collisions at s=8TeV recorded by the CMS experiment at the LHC. Events with two leptons and a jet originating from a b quark are selected. A multivariate analysis based on kinematic and topological properties is used to separate the signal from the dominant tt̄ background. An excess consistent with the signal hypothesis is observed, with a significance which corresponds to 6.1 standard deviations above a background-only hypothesis. The measured production cross section is 23.4±5.4pb, in agreement with the standard model prediction. © 2014 CERN, for the CMS Collaboration.
DescriptionThis article is available under the terms of the Creative Commons Attribution 3.0 License.-- et al.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevLett.112.231802
URIhttp://hdl.handle.net/10261/110204
DOI10.1103/PhysRevLett.112.231802
Identifiersdoi: 10.1103/PhysRevLett.112.231802
e-issn: 1079-7114
issn: 0031-9007
Appears in Collections:(IFCA) Artículos
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