Observation of the associated production of a single top quark and a W boson in pp collisions at sqrt(s) = 8 TeV
(2014) Physical Review Letters — Vol. 112, p. 231802 (2014)
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- 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 inverse femtobarns of proton-proton collisions at sqrt(s) = 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 t t-bar 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.
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CMS Collaboration, Basegmez, S., Beluffi, C., Bruno, G., Castello, R., Caudron, A., Ceard, L., Da Silveira, G. G., Delaere, C., Du Pree, T., Favart, D., Forthomme, L., Giammanco, A., Hollar, J., Jez, P., Komm, M., Lemaitre, V., Liao, J., Militaru, O., et al. (2014). Observation of the associated production of a single top quark and a W boson in pp collisions at sqrt(s) = 8 TeV. Physical Review Letters, 112, 231802. https://doi.org/10.1103/PhysRevLett.112.231802 (Original work published 2014)