Observation of Single Top Quark Production in Association with a Z Boson in Proton-Proton Collisions at √s=13 TeV
Ver/ Abrir
Registro completo
Mostrar el registro completo DCAutoría
Sirunyan, A. M.; Cabrillo Bartolomé, José Ibán; Calderón Tazón, Alicia; Chazín Quero, Bárbara; Duarte Campderros, Jorge; Fernández García, Marcos; Fernández Manteca, Pedro José; García Alonso, Andrea; García Ferrero, Juan; Gómez Gramuglio, Gervasio; López Virto, María Amparo; Marco de Lucas, Jesús; Martínez Rivero, Celso; Martínez Ruiz del Árbol, Pablo; Matorras Weinig, Francisco; Piedra Gómez, Jonatan; Prieëls, Cédric; Rodrigo Anoro, Teresa; Ruiz Jimeno, Alberto; [et al.]Fecha
2019-04Derechos
Attribution 4.0 International. © 2010 CERN, for the CMS Collaboration
Publicado en
Phys. Rev. Lett. 122, 132003 (2019)
Editorial
American Physical Society
Enlace a la publicación
Resumen/Abstract
The observation of single top quark production in association with a Z boson and a quark (tZq) is reported. Events from proton-proton collisions at a center-of-mass energy of 13 TeV containing three charged leptons (either electrons or muons) and at least two jets are analyzed. The data were collected with the CMS detector in 2016 and 2017 and correspond to an integrated luminosity of 77.4fb−1. The increased integrated luminosity, a multivariate lepton identification, and a redesigned analysis strategy improve significantly the sensitivity of the analysis compared to previous searches for tZq production. The tZq signal is observed with a significance well over 5 standard deviations. The measured tZq production cross section is σ(pp→tZq→tℓ+ℓ−q)=111±13(stat)+11−9(syst) fb, for dilepton invariant masses above 30 GeV, in agreement with the standard model expectation.
Colecciones a las que pertenece
- D52 Artículos [1180]