Scientific article
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Observation of Wγγ triboson production in proton-proton collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector

ContributorsATLAS Collaboration
Published inPhysics letters. B, vol. 848, 138400
Publication date2024

This letter reports the observation of W(ℓν)γγ production in proton-proton collisions. This measurement uses the full Run 2 sample of events recorded at a center-of-mass energy of s=13 TeV by the ATLAS detector at the LHC, corresponding to an integrated luminosity of 140 fb−1. Events with a leptonically-decaying W 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 W(eν)γγ and W(μν)γγ events is measured to be σfid=13.8±1.1(stat)+2.1−2.0(syst)±0.1(lumi) fb, in agreement with the Standard Model prediction.

  • P p: scattering
  • P p: colliding beams
  • Vector boson: multiple production
  • W: associated production
  • Photon: pair production
  • W: leptonic decay
  • Electron
  • Muon
  • CERN LHC Coll
  • Two-photon
  • Channel cross section: measured
  • Experimental results
  • 13000 GeV-cms
Citation (ISO format)
ATLAS Collaboration. Observation of W<i>γγ </i>triboson production in proton-proton collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector. In: Physics letters. B, 2024, vol. 848, p. 138400. doi: 10.1016/j.physletb.2023.138400
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Article (Published version)
ISSN of the journal0370-2693

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