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Test of CP Invariance in Higgs Boson Vector-Boson-Fusion Production Using the H→γγ Channel with the ATLAS Detector

GONELLA, Laura
•
ATLAS Collaboration
2023
  • journal article

Periodico
PHYSICAL REVIEW LETTERS
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.
DOI
10.1103/physrevlett.131.061802
WOS
WOS:001162013700001
Archivio
https://hdl.handle.net/11368/3101115
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85173602641
https://journals.aps.org/prl/pdf/10.1103/PhysRevLett.131.061802
Diritti
open access
license:creative commons
license uri:http://creativecommons.org/licenses/by/4.0/
FVG url
https://arts.units.it/bitstream/11368/3101115/1/PhysRevLett.131.061802.pdf
Soggetti
  • Gage

  • Tellurium compound

  • ATLAS detector

  • Effective field theor...

  • Electroweak gauge bos...

  • Higgs boson

  • P-structure

  • Proton proton collisi...

  • Stringent constraint

  • Vector boson

  • Bosons

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