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Author  |
ATLAS Collaboration (Aad, G. et al); Ahuja, S.; Aikot, A.; Amos, K.R.; Bouchhar, N.; Cabrera Urban, S.; Cantero, J.; Castillo Gimenez, V.; Chitishvili, M.; Costa, M.J.; Curcio, F.; Didenko, M.; Escobar, C.; Fiorini, L.; Fuster, J.; Garcia, C.; Garcia Navarro, J.E.; Gonzalez de la Hoz, S.; Hofer, J.; Jimenez Ortega, M.; Lacasta, C.; Lanzac Berrocal, M.; Marti-Garcia, S.; Martinez Agullo, P.; Melini, D.; Mitsou, V.A.; Monsonis Romero, L.; Moreno Llacer, M.; Munoz Perez, D.; Poveda, J.; Rubio Jimenez, A.; Ruiz-Martinez, A.; Saibel, A.; Salt, J.; Sanchez Sebastian, V.; Senthilkumar, V.; Soldevila, U.; Sanchez, J.; Taylor Vara, R.J.; Torro Pastor, E.; Valero, A.; Valiente Moreno, E.; Valls Ferrer, J.A.; Varriale, L.; Villaplana Perez, M.; Vincent, M.; Vos, M.; Wandall-Christensen, K.; Zakareishvili, T. |
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Title |
Observation of W+W-γ production in pp collisions at √s=13 TeV with the ATLAS detector and constraints on anomalous quartic gauge-boson couplings |
Type |
Journal Article |
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Year |
2026 |
Publication |
Physics Letters B |
Abbreviated Journal |
Phys. Lett. B |
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Volume |
873 |
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Pages |
140050 - 21pp |
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Keywords |
Electroweak; Multiboson; WWgamma; Cross-section; Anomalous quartic gauge couplings; EFT |
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Abstract |
This Letter reports the observation of W+W-gamma triboson production in 140 fb(-1) of data collected by the ATLAS detector from proton-proton collisions at a centre-of-mass energy of root s = 13 TeV at the LHC. Events with an opposite-charge e μpair, a high transverse-momentum photon, and significant missing transverse momentum are considered. The observed (expected) significance of the signal is 5.9 (6.0) standard deviations. The measured fiducial cross-section, defined for the W+W-gamma -> e(+/-)mu(-/+)nu(nu) over bar gamma final state is 6.2 +/- 0.8 (stat.) +/- 0.6 (sys.) fb, in good agreement with the Standard Model prediction of 6.1(-0.7)(+1.0) fb. Constraints on the Wilson coefficients of 13 dimension-8 operators describing physics beyond the Standard Model through anomalous quartic gauge-boson couplings are derived using the effective field theory framework. |
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Address |
[Chelkov, G. A.; Desai, A. M.; Fedin, O. L.; Fellers, D. E.; Fewell, M. P.; Gallagher, J.; Grant, C. M.; Green, M. J.; Jackson, P.; Kong, A. X. Y.; Kull, J.; Myagkov, A. G.; Nikolaenko, V.; Oliver, J. L.; Pandya, H. D.; Ruggeri, T. A.; Saha, S.; Smirnova, L. N.; Ting, E. X. L.; White, M. J.] Univ Adelaide, Dept Phys, Adelaide, Australia, Email: atlas.publications@cern.ch |
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Publisher |
Elsevier |
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Language |
English |
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Original Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
0370-2693 |
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Notes |
WOS:001690941000001 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
7122 |
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