Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/10885
Title: Test of CP Invariance in Higgs Boson Vector-Boson-Fusion Production Using the H→γγ Channel with the ATLAS Detector [2]
Authors: Amerl, M.
Filmer, E.K.
Jackson, P.
Kong, A.X.Y.
Potti, H.
Ruggeri, T.A.
Ting, E.X.L.
Keywords: Gages
Tellurium compounds
ATLAS detectors
Effective field theory
Electroweak gauge bosons
Higgs boson
P-structures
Proton proton collisions
Stringent constraints
Vector boson
Bosons
Issue Date: 2023
Publisher: American Physical Society
Abstract: A test of C P invariance in Higgs boson production via vector-boson fusion has been performed in the H → γ γ channel using 139 fb - 1 of proton-proton collision data at s = 13 TeV collected by the ATLAS detector at the LHC. The optimal observable method is used to probe the C P structure of interactions between the Higgs boson and electroweak gauge bosons, as described by an effective field theory. No sign of C P violation is observed in the data. Constraints are set on the parameters describing the strength of the C P -odd component in the coupling between the Higgs boson and the electroweak gauge bosons in two effective field theory bases: d ˜ in the HISZ basis and c H W ˜ in the Warsaw basis. The results presented are the most stringent constraints on C P violation in the coupling between Higgs and weak bosons. The 95% C.L. constraint on d ˜ is derived for the first time and the 95% C.L. constraint on c H W ˜ has been improved by a factor of 5 compared to the previous measurement. © 2023 CERN, for the ATLAS Collaboration.
URI: https://doi.org/10.1103/PhysRevLett.131.061802
https://hdl.handle.net/20.500.11851/10885
ISSN: 0031-9007
Appears in Collections:Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection

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