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Test of CP invariance in higgs boson vector-boson-fusion production using the H → γ γ channel with the ATLAS detector

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 interacti...

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Main Authors: Aad, Georges (Author) , Baltes, Lisa Marie (Author) , Bartels, Falk (Author) , Castillo, Florencia Luciana (Author) , Czurylo, Marta (Author) , Rio, Fernando del (Author) , Dittmeier, Sebastian (Author) , Dunford, Monica (Author) , Franchino, Silvia (Author) , Klassen, Martin (Author) , Mkrtchyan, Tigran (Author) , Ott, Philipp (Author) , Rassloff, Damir Fabrice (Author) , Rodriguez Bosca, Sergi (Author) , Sauer, Christof (Author) , Schöning, André (Author) , Schultz-Coulon, Hans-Christian (Author) , Sothilingam, Varsiha (Author) , Stamen, Rainer (Author) , Starovoitov, Pavel (Author) , Vigani, Luigi (Author) , Weber, Sebastian (Author) , Wessels, Martin (Author) , Zinßer, Joachim (Author)
Corporate Author: ATLAS Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 2023
In: Physical review letters
Year: 2023, Volume: 131, Issue: 6, Pages: 1-23
ISSN:1079-7114
DOI:10.1103/PhysRevLett.131.061802
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1103/PhysRevLett.131.061802
Verlag, kostenfrei, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.131.061802
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Author Notes:G. Aad et al. (ATLAS Collaboration*)
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Summary: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 𝑐𝐻⁡ ˜ 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 𝑐𝐻⁡ ˜𝑊 has been improved by a factor of 5 compared to the previous measurement.
Item Description:Veröffentlicht: 7. August 2023
*ATLAS Collaboration: G. Aad, L.M. Baltes, F. Bartels, F.L. Castillo, M.M. Czurylo, F. Del Rio, S.J. Dittmeier, M. Dunford, S. Franchino, M. Klassen, T. Mkrtchyan, P.S. Ott, D.F. Rassloff, S. Rodriguez Bosca, C. Sauer, A. Schoening, H.-C. Schultz-Coulon, V. Sothilingam, R. Stamen, P. Starovoitov, L. Vigani, S.M. Weber, M. Wessels, J. Zinsser [und 2908 weitere Personen]
Gesehen am 03.07.2025
Physical Description:Online Resource
ISSN:1079-7114
DOI:10.1103/PhysRevLett.131.061802

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