Aad, G.Abbott, B.Beddall, Andrew JohnÇetin, Serkant AliÖztürk, SertaçŞimşek, Sinem2025-06-182025-06-182024ATLAS collaboration. (2023). Test of CP-invariance of the Higgs boson in vector-boson fusion production and its decay into four leptons. arXiv preprint arXiv:2304.09612.1029-8479http://dx.doi.org/10.1007/JHEP05(2024)105https://hdl.handle.net/20.500.12713/7329A search for CP violation in the decay kinematics and vector-boson fusion production of the Higgs boson is performed in the H → ZZ* → 4ℓ (ℓ = e, μ) decay channel. The results are based on proton-proton collision data produced at the LHC at a centre-of-mass energy of 13 TeV and recorded by the ATLAS detector from 2015 to 2018, corresponding to an integrated luminosity of 139 fb−1. Matrix element-based optimal observables are used to constrain CP-odd couplings beyond the Standard Model in the framework of Standard Model effective field theory expressed in the Warsaw and Higgs bases. Differential fiducial cross-section measurements of the optimal observables are also performed, and a new fiducial cross-section measurement for vector-boson-fusion production is provided. All measurements are in agreement with the Standard Model prediction of a CP-even Higgs boson.eninfo:eu-repo/semantics/openAccessHadron-Hadron ScatteringHiggs PhysicsArticle5164WOS:0012800966000012-s2.0-85208419593Q110.1007/JHEP05(2024)105Q1