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Observation of the Associated Production of a Single Top Quark and a W Boson in pp Collisions at vs = 8??TeV

Abstract: The 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 12.2??fb-1 of proton-proton collisions at vs=8??TeV 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 tt¯ 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 ± 5.4??pb, in agreement with the standard model prediction.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Fuente: Phys. Rev. Lett. Vol. 112, Num. 23, Pag. 231802, (2014)

Editorial: American Physical Society

 Fecha de publicación: 01/06/2014

Nº de páginas: 16

Tipo de publicación: Artículo de Revista

 DOI: 10.1103/PhysRevLett.112.231802

ISSN: 0031-9007,1079-7114

Proyecto español: FPA2014-55295-C3-1-R ; FPA 2011-28694-C02-01

Url de la publicación: https://doi.org/10.1103/PhysRevLett.112.231802