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Search for electroweak production of a vector-like T quark using fully hadronic final states

CMS Collaboration; Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Ambrogi, F.; Bergauer, T.; Brandstetter, J.; Dragicevic, M.; Erö, J.; Escalante Del Valle, A.; Flechl, M.; Frühwirth, R.; Jeitler, M.; Krammer, N.; Krätschmer, I.; Liko, D.; Madlener, T.; Mikulec, I.; Rad, N.; Schieck, J.; Schöfbeck, R.; ... mehr

A search is performed for electroweak production of a vector-like top quark partner T of charge 2/3 in association with a top or bottom quark, using proton-proton collision data at √s = 13TeV collected by the CMS experiment at the LHC in 2016. The data sample corresponds to an integrated luminosity of 35.9 fb$^{-1}$. The search targets T quarks over a wide range of masses and fractional widths, decaying to a top quark and either a Higgs boson or a Z boson in fully hadronic final states. The search is performed using two experimentally distinct signatures that depend on whether or not each quark from the decays of the top quark, Higgs boson, or Z boson produces an individual resolved jet. Jet substructure, b tagging, and kinematic variables are used to identify the top quark and boson jets, and also to suppress the standard model backgrounds. The data are found to be consistent with the expected backgrounds. Upper limits at 95% confidence level are set on the cross sections for T quark-mediated production of tHQq, tZQq, and their sum, where Q is the associated top or bottom heavy quark and q is another associated quark. The limits are given for each search signature for various T quark widths up to 30% of the T quark mass, and are between 2 pb and 20 fb for T quark masses in the range 0.6{2.6TeV. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000117797
Veröffentlicht am 19.03.2020
DOI: 10.1007/JHEP01(2020)036
Zitationen: 4
Web of Science
Zitationen: 2
Cover der Publikation
Zugehörige Institution(en) am KIT Forschungszentrum Informatik, Karlsruhe (FZI)
House of Competence (HoC)
Institut für Angewandte Informatik und Formale Beschreibungsverfahren (AIFB)
Institut für Experimentelle Teilchenphysik (ETP)
Institut für Kernphysik (IKP)
Institut für Prozessdatenverarbeitung und Elektronik (IPE)
Institut für Theoretische Teilchenphysik (TTP)
Steinbuch Centre for Computing (SCC)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 01.2020
Sprache Englisch
Identifikator ISSN: 1029-8479
KITopen-ID: 1000117797
HGF-Programm 51.03.03 (POF III, LK 01) Kosmische Strahlung Auger
Erschienen in Journal of high energy physics
Verlag Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Band 2020
Heft 1
Seiten Art. Nr.: 36
Vorab online veröffentlicht am 08.01.2020
Schlagwörter Hadron-Hadron scattering (experiments), vector-like quarks
Nachgewiesen in Web of Science
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