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Observation of tW production in the single-lepton channel in pp collisions at root s=13 TeV

Abstract: ABSTRACT: A measurement of the cross section of the associated production of a single top quark and a W boson in final states with a muon or electron and jets in proton-proton collisions at s? = 13 TeV is presented. The data correspond to an integrated luminosity of 36 fb?1 collected with the CMS detector at the CERN LHC in 2016. A boosted decision tree is used to separate the tW signal from the dominant tt¯ background, whilst the subleading W+jets and multijet backgrounds are constrained using data-based estimates. This result is the first observation of the tW process in final states containing a muon or electron and jets, with a significance exceeding 5 standard deviations. The cross section is determined to be 89 ± 4 (stat) ± 12 (syst) pb, consistent with the standard model.

 Fuente: Journal of High Energy Physics, Vol. 2021, Num.11, Art. Num. 111

 Editorial: Springer Verlag

 Fecha de publicación: 15/11/2021

 Nº de páginas: 40

 Tipo de publicación: Artículo de Revista

 DOI: 10.1007/JHEP11(2021)111

 ISSN: 1126-6708,1029-8479

 Url de la publicación: https://doi.org/10.1007/JHEP11(2021)111