Observation of Wγγ triboson production in proton-proton collisions at √s=13 TeV with the ATLAS detector

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 leptonica...

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Bibliographic Details
Published in:Physics letters. B 2024, Vol.848
Main Authors: Aad, G., Leopold, Alexander, Lundberg, Olof, Lund-Jensen, Bengt, Ohm, Christian, Shaheen, Rabia, Strandberg, Jonas, Zwalinski, L.
Format: Article
Language:English
Online Access:Get full text
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Summary: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.
ISSN:1873-2445
0370-2693
DOI:10.1016/j.physletb.2023.138400