Publication Date
2023
Journal or Book Title
Physical Review Letters
Abstract
A test of CP invariance in Higgs boson production via vector-boson fusion has been performed in the H → γγ channel using 139 fb−1 of proton-proton collision data at ffiffi s p ¼ 13 TeV collected by the ATLAS detector at the LHC. The optimal observable method is used to probe the CP structure of interactions between the Higgs boson and electroweak gauge bosons, as described by an effective field theory. No sign of CP violation is observed in the data. Constraints are set on the parameters describing the strength of the CP-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 cHW˜ in the Warsaw basis. The results presented are the most stringent constraints on CP 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 cHW˜ has been improved by a factor of 5 compared to the previous measurement.
DOI
https://doi.org/10.1103/PhysRevLett.131.061802
Volume
131
Issue
6
License
UMass Amherst Open Access Policy
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Recommended Citation
The ATLAS Collaboration, "Test of C P Invariance in Higgs Boson Vector-Boson-Fusion Production Using the H → γ γ Channel with the ATLAS Detector" (2023). Physical Review Letters. 1303.
https://doi.org/10.1103/PhysRevLett.131.061802