CMS-PAS-TOP-23-009

CMS-PAS-TOP-23-009
Probing the flavour structure of dimension-6 EFT operators in multilepton final states
CMS Collaboration
2 April 2025

Abstract: An analysis of the flavour structure of dimension-6 effective field theory (EFT) operators in multilepton final states is presented, focusing on the interactions involving Z bosons. The flavour structure of these operators is disentangled by simultaneously probing the interactions with different quark generations in final states with at least three leptons, targetting the associated production of a top quark pair and a Z boson ($ \mathrm{t}\overline{\mathrm{t}}\mathrm{Z} $) as well as diboson processes (WZ and ZZ). The data were recorded by the CMS experiment in the years 2016 to 2018 in proton-proton collisions at a centre-of-mass energy of 13 TeV and correspond to an integrated luminosity of 138 fb$^{-1}$. Consistency with the standard model of particle physics is observed and limits on the considered EFT parameters, split into couplings to light and heavy quark generations, are set.
Links: CDS record (PDF) ; Physics Briefing ; CADI line (restricted) ; These preliminary results are superseded in this paper, Submitted to JHEP. The superseded preliminary plots can be found here.

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