Asearch for the production of three massive vector bosons, 𝑉𝑉𝑍(𝑉 = 𝑊,𝑍), in proton–proton collisions at √𝑠=13TeV is performed using data with an integrated luminosity of 140 fb−1 recorded by the ATLAS detector at the Large Hadron Collider. Events produced in the leptonic final states 𝑊𝑊𝑍→𝓁𝜈𝓁𝜈𝓁𝓁 (𝓁 =𝑒,𝜇), 𝑊𝑍𝑍→ 𝓁𝜈𝓁𝓁𝓁𝓁, 𝑍𝑍𝑍→𝓁𝓁𝓁𝓁𝓁𝓁, and the semileptonic final states 𝑊𝑊𝑍→ 𝑞𝑞𝓁𝜈𝓁𝓁 and 𝑊𝑍𝑍→ 𝓁𝜈𝑞𝑞𝓁𝓁, are analysed. The measured cross section for the 𝑝𝑝 → 𝑉𝑉𝑍process is 660+93 −90 (stat.)+88 −81 (syst.) fb, and the observed (expected) significance is 6.4 (4.7) standard deviations, representing the observation of 𝑉𝑉𝑍 production. In addition, the measured cross section for the 𝑝𝑝 → 𝑊𝑊𝑍 process is 442 ± 94(stat.)+60 −52 (syst.) fb, and the observed (expected) significance is 4.4 (3.6) standard deviations, representing evidence of 𝑊𝑊𝑍production. The measured cross sections are consistent with the Standard Model predictions. Constraints on physics beyond the Standard Model are also derived in the effective field theory framework by setting limits on Wilson coefficients for dimension-8 operators describing anomalous quartic gauge boson couplings.

Aad, G., Aakvaag, E., Abbott, B., Abdelhameed, S., Abeling, K., Abicht, N.J., et al. (2025). Observation of 𝑉𝑉𝑍production at √𝑠 =13TeV with the ATLAS detector. PHYSICS LETTERS. SECTION B, 866, 1-27 [10.1016/j.physletb.2025.139527].

Observation of 𝑉𝑉𝑍production at √𝑠 =13TeV with the ATLAS detector

Alberghi, G. L.;Alfonsi, F.;Ballabene, E.;Bellagamba, L.;Bianco, G.;Boscherini, D.;Bruni, A.;Carratta, G.;Corchia, F. A.;Cremonini, D.;De Castro, S.;Fabbri, F.;Fabbri, L.;Franchini, M.;Gabrielli, A.;Giacobbe, B.;Lasagni Manghi, F.;Levrini, G.;Nechaeva, S.;Polini, A.;Rinaldi, L.;Romano, M.;Sanzani, E.;Sbarra, C.;Sbrizzi, A.;Semprini-Cesari, N.;Sioli, M.;Todome, K.;Valentinetti, S.;Villa, M.;Vittori, C.;Vivarelli, I.;Zoccoli, A.;
2025

Abstract

Asearch for the production of three massive vector bosons, 𝑉𝑉𝑍(𝑉 = 𝑊,𝑍), in proton–proton collisions at √𝑠=13TeV is performed using data with an integrated luminosity of 140 fb−1 recorded by the ATLAS detector at the Large Hadron Collider. Events produced in the leptonic final states 𝑊𝑊𝑍→𝓁𝜈𝓁𝜈𝓁𝓁 (𝓁 =𝑒,𝜇), 𝑊𝑍𝑍→ 𝓁𝜈𝓁𝓁𝓁𝓁, 𝑍𝑍𝑍→𝓁𝓁𝓁𝓁𝓁𝓁, and the semileptonic final states 𝑊𝑊𝑍→ 𝑞𝑞𝓁𝜈𝓁𝓁 and 𝑊𝑍𝑍→ 𝓁𝜈𝑞𝑞𝓁𝓁, are analysed. The measured cross section for the 𝑝𝑝 → 𝑉𝑉𝑍process is 660+93 −90 (stat.)+88 −81 (syst.) fb, and the observed (expected) significance is 6.4 (4.7) standard deviations, representing the observation of 𝑉𝑉𝑍 production. In addition, the measured cross section for the 𝑝𝑝 → 𝑊𝑊𝑍 process is 442 ± 94(stat.)+60 −52 (syst.) fb, and the observed (expected) significance is 4.4 (3.6) standard deviations, representing evidence of 𝑊𝑊𝑍production. The measured cross sections are consistent with the Standard Model predictions. Constraints on physics beyond the Standard Model are also derived in the effective field theory framework by setting limits on Wilson coefficients for dimension-8 operators describing anomalous quartic gauge boson couplings.
2025
Aad, G., Aakvaag, E., Abbott, B., Abdelhameed, S., Abeling, K., Abicht, N.J., et al. (2025). Observation of ������production at √�� =13TeV with the ATLAS detector. PHYSICS LETTERS. SECTION B, 866, 1-27 [10.1016/j.physletb.2025.139527].
Aad, G.; Aakvaag, E.; Abbott, B.; Abdelhameed, S.; Abeling, K.; Abicht, N. J.; Abidi, S. H.; Aboelela, M.; Aboulhorma, A.; Abramowicz, H.; Abulaiti, Y...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/1044371
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