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

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arxiv 2308.03041 v2 pith:TXA45MMP submitted 2023-08-06 hep-ex

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

classification hep-ex
keywords gammamathrmeventsproductionatlascollisionsdetectorobservation
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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This letter reports the observation of $W(\ell\nu)\gamma\gamma$ production in proton-proton collisions. This measurement uses the full Run 2 sample of events recorded at a center-of-mass energy of $\sqrt{s} = 13$ 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 $W(e\nu)\gamma\gamma$ and $W(\mu\nu)\gamma\gamma$ events is measured to be $\sigma_{\mathrm{fid}} = 13.8 \pm 1.1 (\mathrm{stat}) \substack{+2.1 \\ -2.0} (\mathrm{syst}) \pm 0.1 (\mathrm{lumi})$ fb, in agreement with the Standard Model prediction.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Observation of $W^{+}W^{-}\gamma$ production in $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector and constraints on anomalous quartic gauge-boson couplings

    hep-ex 2025-09 unverdicted novelty 6.0

    ATLAS reports the observation of W⁺W⁻γ triboson production with 5.9σ significance and derives constraints on anomalous quartic gauge-boson couplings via effective field theory.

  2. Combined effective field theory interpretation of measurements sensitive to quartic gauge boson couplings in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector

    hep-ex 2026-03 accept novelty 5.0

    Combined ATLAS VBS and triboson data constrain 17 Éboli-model dimension-8 Wilson coefficients for anomalous quartic gauge couplings, with and without unitarity clipping.

  3. Combined effective field theory interpretation of measurements sensitive to quartic gauge boson couplings in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector

    hep-ex 2026-03 accept novelty 5.0

    Combined ATLAS VBS and triboson data constrain 17 Éboli-model dimension-8 Wilson coefficients for anomalous quartic gauge couplings, with and without unitarity bounds.