@misc{10481/92423, year = {2024}, month = {1}, url = {https://hdl.handle.net/10481/92423}, abstract = {This Letter reports the observation of WZγ production and a measurement of its cross section using 140.1 ± 1.2 fb−1 of proton-proton collision data recorded at a center-of-mass energy of 13 TeV by the ATLAS detector at the Large Hadron Collider. The WZγ production cross section, with both the W and Z bosons decaying leptonically, pp → WZγ → l'±vl+lγ (l(') = e, μ), is measured in a fiducial phase-space region defined such that the leptons and the photon have high transverse momentum and the photon is isolated. The cross section is found to be 2.01 ± 0.30(stat) ± 0.16(syst) fb. The corresponding standard model predicted cross section calculated at next-to-leading order in perturbative quantum chromodynamics and at leading order in the electroweak coupling constant is 1.50 ± 0.06 fb. The observed significance of the WZγ signal is 6.3σ, compared with an expected significance of 5.0σ.}, organization = {CERN}, organization = {MICINN}, organization = {COST}, organization = {ERC}, organization = {ERDF}, organization = {Horizon 2020}, organization = {Marie Skłodowska-Curie Actions}, organization = {La Caixa Banking Foundation}, organization = {CERCA Programme Generalitat de Catalunya}, organization = {PROMETEO and GenT Programmes Generalitat Valenciana}, publisher = {American Physical Society}, title = {Observation of WZγ Production in pp Collisions at √s=13 TeV with the ATLAS Detector}, doi = {10.1103/PhysRevLett.132.021802}, author = {Aad, G. and Rodríguez Chala, Mikael and Atlas Collaboration, /}, }