Evidence for tWZ production in proton-proton collisions at √s=13 TeV in multilepton final states

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Author
Hayrapetyan, A.
Tumasyan, A.
Adam, W.
Andrejkovic, J. W.
Bergauer, T.
Chatterjee, S.
Damanakis, K.
Dragicevic, M.
Del Valle, A. Escalante
Hussain, P. S.
Finger, MichaelORCiD Profile - 0000-0003-3155-2484WoS Profile - P-9117-2017Scopus Profile - 8435121500
Finger, MiroslavORCiD Profile - 0000-0002-7828-9970WoS Profile - P-7005-2017Scopus Profile - 55708019600
Květoň, AntonínORCiD Profile - 0000-0001-8197-1914WoS Profile - AAA-9178-2020Scopus Profile - 57188628481

Publication date
2024
Published in
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume / Issue
855 (21.06.2024)
ISBN / ISSN
ISSN: 0370-2693
ISBN / ISSN
eISSN: 1873-2445
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Abstract
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 root 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, Single top quark, Z boson, Machine learning, Multilepton,
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https://hdl.handle.net/20.500.14178/2924
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