A search for CP violation in the decay kinematics and vector-boson 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.
- Test of CP-invariance of the Higgs boson in vector-boson fusion production and its decay into four leptons
- ATLAS Collaboration (Author)James Bensinger (Author) - Brandeis University, Martin A. Fisher School of PhysicsCraig Blocker (Author) - Brandeis University, Martin A. Fisher School of PhysicsGabriella Sciolla (Author) - Brandeis University, Martin A. Fisher School of Physics
- Journal of high energy physics : JHEP, Vol.2024, 105
- Springer
- 9924361784201921
- Martin A. Fisher School of Physics
- Journal article