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Title

Search for vector-like quarks in events with two oppositely charged leptons and jets in proton-proton collisions at √s = 13 TeV

AuthorsBrochero Cifuentes, J. A. ; Cabrillo, I. J. ; Calderon, Alicia ; Chazin Quero, B.; Duarte Campderros, J. ; Fernandez, M.; Fernández Manteca, P. J.; García Alonso, A.; García-Ferrero, J. ; Gómez, G. ; López Virto, A. ; Marco, Jesús ; Martínez-Rivero, Celso ; Martínez Ruiz del Arbol, P. ; Matorras, Francisco ; Piedra, Jonatan ; Prieels, C.; Rodrigo, Teresa ; Ruiz Jimeno, Alberto ; Scodellaro, Luca ; Trevisani, N. ; Vila, Iván ; Vilar Cortabitarte, R.
Issue Date26-Apr-2019
PublisherSpringer
CitationEuropean Physical Journal C 79: 364 (2019)
AbstractA search for the pair production of heavy vectorlike partners T and B of the top and bottom quarks has been performed by the CMS experiment at the CERN LHC using proton-proton collisions at √s = 13 TeV. The data sample was collected in 2016 and corresponds to an integrated luminosity of 35.9fb. Final states studied for TT production include those where one of the T quarks decays via T → tZ and the other via T → bW, tZ, or tH, where H is a Higgs boson. For the BB case, final states include those where one of the B quarks decays via B → bZ and the other B → tW, bZ, or bH. Events with two oppositely charged electrons or muons, consistent with coming from the decay of a Z boson, and jets are investigated. The number of observed events is consistent with standard model background estimations. Lower limits at 95% confidence level are placed on the masses of the T and B quarks for a range of branching fractions. Assuming 100% branching fractions for T → tZ, and B → bZ, T and B quark mass values below 1280 and 1130 GeV, respectively, are excluded. 7copy; CERN for the benefit of the CMS collaboration 2019.
Publisher version (URL)http://dx.doi.org/10.1140/epjc/s10052-019-6855-8
URIhttp://hdl.handle.net/10261/213721
Identifiersdoi: 10.1140/epjc/s10052-019-6855-8
e-issn: 1434-6052
issn: 1434-6044
Appears in Collections:(IFCA) Artículos
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