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

The ATLAS collaboration

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1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Article number138400
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume848
DOIs
Publication statusPublished - Jan 2024
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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