The CMS Collaboration2024-08-072024-08-072024The CMS Collaboration. (2024). Evidence for tWZ production in proton-proton collisions at s=13 TeV in multilepton final states. Physics Letters B, 855, 138815. https://doi.org/10.1016/j.physletb.2024.138815https://hdl.handle.net/1911/117595The first evidence for the standard model production of a top quark in association with a W boson and a Z boson is reported. The measurement is performed in multilepton final states, where the Z boson is reconstructed via its decays to electron or muon pairs. At least one W boson, associated or from top quark decay, decays leptonically, too. The analysed data were recorded by the CMS experiment at the CERN LHC in 2016–2018 in proton-proton collisions at s=13 TeV, and correspond to an integrated luminosity of 138 fb−1. The measured cross section is 354±54(stat)±95(syst) fb, and corresponds to a statistical significance of 3.4 standard deviations.engExcept where otherwise noted, this work is licensed under a Creative Commons Attribution (CC BY) license.  Permission to reuse, publish, or reproduce the work beyond the terms of the license or beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.Journal article1-s2-0-S0370269324003733-mainhttps://doi.org/10.1016/j.physletb.2024.138815