Evidence for tWZ Production in Proton-Proton Collisions at √s = 13 TeV in Multilepton Final States

Physics Letters B 2024
Kārlis Dreimanis, Antra Gaile, Guntis Pikurs, Andris Potrebko, Markus Seidel, Viesturs Veckalns, CMS Collaboration

The 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.

Keywords
CMS | Machine learning | Multilepton | Single top quark | Z boson
DOI
10.1016/j.physletb.2024.138815
Hyperlink
https://www.sciencedirect.com/science/article/pii/S0370269324003733

The CMS Collaboration, A.Tumasyan, K.Dreimanis, G.Pikurs, A.Potrebko, M.Seidel, V.Veckalns ... [et al.]. Evidence for tWZ Production in Proton-Proton Collisions at √s = 13 TeV in Multilepton Final States. Physics Letters B, 2024, Vol. 855, Article number 138815. ISSN 0370-2693. Pieejams: doi:10.1016/j.physletb.2024.138815

Publication language
English (en)