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.

Aad, G., Abbott, B., Abbott, D.C., Abed Abud, A., Abeling, K., Abhayasinghe, D.K., et al. (2024). Observation of Wγγ triboson production in proton-proton collisions at s=13 TeV with the ATLAS detector. PHYSICS LETTERS. SECTION B, 848 [10.1016/j.physletb.2023.138400].

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

Cerri A.;
2024-01-01

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.
2024
Aad, G., Abbott, B., Abbott, D.C., Abed Abud, A., Abeling, K., Abhayasinghe, D.K., et al. (2024). Observation of Wγγ triboson production in proton-proton collisions at s=13 TeV with the ATLAS detector. PHYSICS LETTERS. SECTION B, 848 [10.1016/j.physletb.2023.138400].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/1269985