Test of CP-invariance of the Higgs boson in vector-boson fusion production and in its decay into four leptons
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Materia
Hadron-Hadron Scattering Higgs Physics
Fecha
2024-05-09Referencia bibliográfica
Aad, G. & Rodríguez Chala, M. & ATLAS collaboration. J. High Energ. Phys. 2024, 105 (2024). [https://doi.org/10.1007/JHEP05(2024)105]
Patrocinador
CERN for the very successful operation of the LHC; SERI, SNSF and Cantons of Bern and Geneva, Switzerland; DOE and NSF, United States of America. In addition, individual groups and members have received support from BCKDF, CANARIE; PRIMUS 21/SCI/017 and UNCE SCI/013, Czech Republic; COST, ERC, ERDF, Horizon 2020, ICSC-NextGenerationEU and Marie Skłodowska-Curie Actions, European Union; Investissements d’Avenir Labex, Investissements d’Avenir Idex and ANR, France; DFG and AvH Foundation, Germany; Norwegian Financial Mechanism 2014–2021, Norway; La Caixa Banking Foundation, CERCA Programme Generalitat de Catalunya and PROMETEO and GenT Programmes Generalitat Valenciana, Spain; Göran Gustafssons Stiftelse, Sweden; The Royal Society and Leverhulme Trust, United Kingdom; Crucial computing support from all WLCG partners is acknowledged gratefully, in particular from CERNResumen
A search for CP violation in the decay kinematics and vector-boson fusion
production of the Higgs boson is performed in the H ! ZZ ! 4` (` = e, μ) decay channel.
The results are based on proton-proton collision data produced at the LHC at a centre-of-mass
energy of 13TeV 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.