A combination of measurements of the CP properties of Higgs boson interactions with electroweak gauge bosons is presented, using 140 fb-1 of proton-proton collisions at root s =13 TeV recorded by the ATLAS detector. Results from vector boson fusion H -> tau tau / WW* / gamma gamma, inclusive H -> ZZ, and WH, H → b bbar channels are combined. No evidence of CP violation is observed, and constrains on the CP-violating operators in the Standard Model effective field theory framework (SMEFT) are set in the Warsaw basis. The results from the combination improve by over 40% on previous individual limits on c_(H Wtilde) and, for the first time, simultaneous constraints on three coefficients c_(H Wtilde), c_(H Btilde), and c_(H Wtilde B) are set. These limits are the most stringent constraints to date on the relevant Wilson coefficients in the SMEFT framework with minimum model dependence.

Aad, G., Aakvaag, E., Abbott, B., Abdelhameed, S., Abeling, K., Abicht, N. ., et al. (2026). Combination of Measurements of CP Properties of Higgs Boson Interactions with Vector Bosons Using Proton-Proton Collisions at root s = 13 TeV with the ATLAS Detector. PHYSICAL REVIEW LETTERS, 137(2) [10.1103/54vv-lgc7].

Combination of Measurements of CP Properties of Higgs Boson Interactions with Vector Bosons Using Proton-Proton Collisions at root s = 13 TeV with the ATLAS Detector

Aielli, G.;Camarri, P.;Cerrito, L.;De Sanctis, U.;Di Ciaccio, A.;
2026-01-01

Abstract

A combination of measurements of the CP properties of Higgs boson interactions with electroweak gauge bosons is presented, using 140 fb-1 of proton-proton collisions at root s =13 TeV recorded by the ATLAS detector. Results from vector boson fusion H -> tau tau / WW* / gamma gamma, inclusive H -> ZZ, and WH, H → b bbar channels are combined. No evidence of CP violation is observed, and constrains on the CP-violating operators in the Standard Model effective field theory framework (SMEFT) are set in the Warsaw basis. The results from the combination improve by over 40% on previous individual limits on c_(H Wtilde) and, for the first time, simultaneous constraints on three coefficients c_(H Wtilde), c_(H Btilde), and c_(H Wtilde B) are set. These limits are the most stringent constraints to date on the relevant Wilson coefficients in the SMEFT framework with minimum model dependence.
2026
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore PHYS-01/A - Fisica sperimentale delle interazioni fondamentali e applicazioni
English
Con Impact Factor ISI
Aad, G., Aakvaag, E., Abbott, B., Abdelhameed, S., Abeling, K., Abicht, N. ., et al. (2026). Combination of Measurements of CP Properties of Higgs Boson Interactions with Vector Bosons Using Proton-Proton Collisions at root s = 13 TeV with the ATLAS Detector. PHYSICAL REVIEW LETTERS, 137(2) [10.1103/54vv-lgc7].
Aad, G; Aakvaag, E; Abbott, B; Abdelhameed, S; Abeling, K; Abicht, N ; Abidi, S ; Aboelela, M; Aboulhorma, A; Abramowicz, H; Acharya, B ; Ackermann, A...espandi
Articolo su rivista
File in questo prodotto:
File Dimensione Formato  
PhysRevLett.137.021801.pdf

accesso aperto

Tipologia: Versione Editoriale (PDF)
Licenza: Creative commons
Dimensione 1.49 MB
Formato Adobe PDF
1.49 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/468950
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact