Observation of W?? triboson production in proton-proton collisions at ?s=13 TeV with the ATLAS detector
Date
2024/01/01
Authors
Aad G.
Abbott B.
Abeling K.
Abicht N. J.
Abidi S. H.
Aboulhorma A.
Abramowicz H.
Abreu H.
Abulaiti Y.
Abusleme Hoffman A. C.
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Abstract
This letter reports the observation of () production in proton-proton collisions. This measurement uses the full Run 2 sample of events recorded at a center-of-mass energy of root= 13 TeV by the ATLAS detector at the LHC, corresponding to an integrated luminosity of 140 fb-1. Events with a leptonically-decaying boson and at least two photons are considered. The background-only hypothesis is rejected with an observed and expected significance of 5.6 standard deviations. The inclusive fiducial production cross section of () and () events is measured to be fid = 13.8 +/- 1.1(stat)+2.1-2.0(syst) +/- 0.1(lumi) fb, in agreement with the Standard Model prediction.