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

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

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...

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Príomhchruthaitheoirí: Aad, G, Abbott, B, Abeling, K, Abicht, NJ, Abidi, SH, Aboulhorma, A, Abramowicz, H, Abreu, H, Abulaiti, Y, Abusleme Hoffman, AC, Acharya, BS, Adam Bourdarios, C, Adamczyk, L, Adamek, L, Addepalli, SV, Addison, MJ, Adelman, J, Adiguzel, A, Adye, T, Affolder, AA, Afik, Y, Agaras, MN, Agarwala, J, Aggarwal, A, Barr, AJ, Bortoletto, D, Bruckler, TL, Celli, F, Chen, M, Conroy, EI, Cooper-Sarkar, AM, Draguet, MA, Eberwein, GH, Frost, JA, Gallas, EJ, Grundy, JC, Gwenlan, C, Harris, YT, Hays, CP, Huffman, TB, Karava, K, Koch, SF, Li, Z, Merlassino, C, Nagai, K, Nedic, L, Nickerson, RB, Rossi, E, Ruggiero, A, Schopf, E, Shipsey, IPJ, Smith, HA, Veliscek, I, Viehhauser, GHA, Wei, Y, Weidberg, AR, Wölker, R, Yan, S
Formáid: Journal article
Teanga:English
Foilsithe / Cruthaithe: Springer 2024
Cur síos
Achoimre: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.

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