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Measuring the CP properties of the Higgs boson in its decay to τ leptons with the ATLAS detector.

Research output: Thesis › Doctoral Thesis

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Measuring the CP properties of the Higgs boson in its decay to τ leptons with the ATLAS detector. / Spinali, Sebastiano.
Lancaster University, 2023. 217 p.

Research output: Thesis › Doctoral Thesis

Harvard

Spinali, S 2023, 'Measuring the CP properties of the Higgs boson in its decay to τ leptons with the ATLAS detector.', PhD, Lancaster University. https://doi.org/10.17635/lancaster/thesis/2087

APA

Spinali, S. (2023). Measuring the CP properties of the Higgs boson in its decay to τ leptons with the ATLAS detector. [Doctoral Thesis, Lancaster University]. Lancaster University. https://doi.org/10.17635/lancaster/thesis/2087

Vancouver

Spinali S. Measuring the CP properties of the Higgs boson in its decay to τ leptons with the ATLAS detector.. Lancaster University, 2023. 217 p. doi: 10.17635/lancaster/thesis/2087

Author

Spinali, Sebastiano. / Measuring the CP properties of the Higgs boson in its decay to τ leptons with the ATLAS detector.. Lancaster University, 2023. 217 p.

Bibtex

@phdthesis{c922079551204ebfa5e64566857b27f6,
title = "Measuring the CP properties of the Higgs boson in its decay to τ leptons with the ATLAS detector.",
abstract = "This thesis presents a study of the CP properties of the Standard Model (SM) Higgs boson interaction with τ leptons. In those SM interactions the CP symmetry is conserved. The measurement of the properties is performed by defning a CP sensitive angular observable ϕ∗CP , which can be kinematically constructed from the Higgs visible decay products. The interactions occurring between the SM Higgs particle and the τ particles are described by making use of a mixing angle φτ appearing in the Yukawa coupling. The two channelsconsidered in the thesis are the τhadτhad and the τlepτhad channels, where τhad denotes a hadronic decay of the τ and τlep denotes a leptonic τ decay. The study is performed usingproton-proton collision data recorded between 2015 and 2018 with the ATLAS detectorat the Large Hadron Collider. The measured (expected) φτ value is equal to 8.68◦ ± 16◦(0◦ ± 28◦) at the 68% condence level (CL), and 8.68◦ ± 34◦(−70◦/ + 75◦) at the 95.5%CL. The pure CP-odd hypothesis is rejected at a value of 3.4σ (standard deviation), whichimplies a compatibility between the measurement and the Higgs prediction in the StandardModel.",
author = "Sebastiano Spinali",
year = "2023",
doi = "10.17635/lancaster/thesis/2087",
language = "English",
publisher = "Lancaster University",
school = "Lancaster University",

}

RIS

TY - BOOK

T1 - Measuring the CP properties of the Higgs boson in its decay to τ leptons with the ATLAS detector.

AU - Spinali, Sebastiano

PY - 2023

Y1 - 2023

N2 - This thesis presents a study of the CP properties of the Standard Model (SM) Higgs boson interaction with τ leptons. In those SM interactions the CP symmetry is conserved. The measurement of the properties is performed by defning a CP sensitive angular observable ϕ∗CP , which can be kinematically constructed from the Higgs visible decay products. The interactions occurring between the SM Higgs particle and the τ particles are described by making use of a mixing angle φτ appearing in the Yukawa coupling. The two channelsconsidered in the thesis are the τhadτhad and the τlepτhad channels, where τhad denotes a hadronic decay of the τ and τlep denotes a leptonic τ decay. The study is performed usingproton-proton collision data recorded between 2015 and 2018 with the ATLAS detectorat the Large Hadron Collider. The measured (expected) φτ value is equal to 8.68◦ ± 16◦(0◦ ± 28◦) at the 68% condence level (CL), and 8.68◦ ± 34◦(−70◦/ + 75◦) at the 95.5%CL. The pure CP-odd hypothesis is rejected at a value of 3.4σ (standard deviation), whichimplies a compatibility between the measurement and the Higgs prediction in the StandardModel.

AB - This thesis presents a study of the CP properties of the Standard Model (SM) Higgs boson interaction with τ leptons. In those SM interactions the CP symmetry is conserved. The measurement of the properties is performed by defning a CP sensitive angular observable ϕ∗CP , which can be kinematically constructed from the Higgs visible decay products. The interactions occurring between the SM Higgs particle and the τ particles are described by making use of a mixing angle φτ appearing in the Yukawa coupling. The two channelsconsidered in the thesis are the τhadτhad and the τlepτhad channels, where τhad denotes a hadronic decay of the τ and τlep denotes a leptonic τ decay. The study is performed usingproton-proton collision data recorded between 2015 and 2018 with the ATLAS detectorat the Large Hadron Collider. The measured (expected) φτ value is equal to 8.68◦ ± 16◦(0◦ ± 28◦) at the 68% condence level (CL), and 8.68◦ ± 34◦(−70◦/ + 75◦) at the 95.5%CL. The pure CP-odd hypothesis is rejected at a value of 3.4σ (standard deviation), whichimplies a compatibility between the measurement and the Higgs prediction in the StandardModel.

U2 - 10.17635/lancaster/thesis/2087

DO - 10.17635/lancaster/thesis/2087

M3 - Doctoral Thesis

PB - Lancaster University

ER -