Test of CP-invariance of the Higgs boson in vector-boson fusion production and in its decay into four leptons

UNSPECIFIED (2024) Test of CP-invariance of the Higgs boson in vector-boson fusion production and in its decay into four leptons. Journal of High Energy Physics, 2024 (5): 105. ISSN 1029-8479

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Abstract

A search for CP violation in the decay kinematics and vector-boson fusion 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.

Item Type:
Journal Article
Journal or Publication Title:
Journal of High Energy Physics
Subjects:
?? hadron-hadron scatteringhiggs physics ??
ID Code:
220362
Deposited By:
Deposited On:
22 May 2024 10:40
Refereed?:
Yes
Published?:
Published
Last Modified:
23 May 2024 01:25