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Probing effective field theory operators in the associated production of top quarks with a Z boson in multilepton final states at $ \sqrt{s} $ = 13 TeV

CMS Collaboration; Tonon, N.; Aarup Petersen, H.; Aldaya Martin, M.; Asmuss, P.; Baxter, S.; Bayatmakou, M.; Behnke, O.; Bermúdez Martínez, A.; Bhattacharya, S.; Bin Anuar, A. A.; Borras, K.; Brunner, D.; Campbell, A.; Cardini, A.; Cheng, C.; Colombina, F.; Consuegra Rodríguez, S.; Correia Silva, G.; ... mehr


A search for new top quark interactions is performed within the framework of an effective field theory using the associated production of either one or two top quarks with a Z boson in multilepton final states. The data sample corresponds to an integrated luminosity of 138 fb−1 of proton-proton collisions at s√ = 13 TeV collected by the CMS experiment at the LHC. Five dimension-six operators modifying the electroweak interactions of the top quark are considered. Novel machine-learning techniques are used to enhance the sensitivity to effects arising from these operators. Distributions used for the signal extraction are parameterized in terms of Wilson coefficients describing the interaction strengths of the operators. All five Wilson coefficients are simultaneously fit to data and 95% confidence level intervals are computed. All results are consistent with the SM expectations.

Verlagsausgabe §
DOI: 10.5445/IR/1000141311
Veröffentlicht am 17.12.2021
DOI: 10.1007/JHEP12(2021)083
Zitationen: 5
Zitationen: 3
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Astroteilchenphysik (IAP)
Institut für Experimentelle Teilchenphysik (ETP)
Institut für Prozessdatenverarbeitung und Elektronik (IPE)
Steinbuch Centre for Computing (SCC)
Universität Karlsruhe (TH) – Zentrale Einrichtungen (Zentrale Einrichtungen)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 12.2021
Sprache Englisch
Identifikator ISSN: 1029-8479
KITopen-ID: 1000141311
Erschienen in Journal of high energy physics
Verlag Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Band 2021
Heft 12
Seiten Art.-Nr.: 83
Bemerkung zur Veröffentlichung Gefördert durch SCOAP3
Vorab online veröffentlicht am 13.12.2021
Nachgewiesen in Web of Science
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