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Measurement of the CP properties of Higgs boson interactions with τ -leptons with the ATLAS detector ATLAS Collaboration
Abstract
A study of the charge conjugation and parity (CP) properties of the interaction between the Higgs boson and τ -leptons is presented. The study is based on a measurement of CP-sensitive angular observables defined by the visible decay products of τ -leptons produced in Higgs boson decays. The analysis uses 139 fb−1 of proton–proton collision data recorded at a centre-of-mass energy of √s = 13 TeV with the ATLAS detector at the Large Hadron Collider. Contributions from CP-violating interactions between the Higgs boson and τ -leptons are described by a single mixing angle parameter φτ in the generalised Yukawa interaction. Without constraining the H → τ τ signal strength to its expected value under the Standard Model hypothesis, the mixing angle φτ is measured to be 9◦±16◦, with an expected value of 0◦ ± 28◦ at the 68% confidence level. The pure CPodd hypothesis is disfavoured at a level of 3.4 standard deviations. The results are compatible with the predictions for the Higgs boson in the Standard Model.
Item Metadata
Title |
Measurement of the CP properties of Higgs boson interactions with τ -leptons with the ATLAS detector
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Creator | |
Publisher |
Springer Berlin Heidelberg
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Date Issued |
2023-07-04
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Description |
A study of the charge conjugation and parity
(CP) properties of the interaction between the Higgs boson
and τ -leptons is presented. The study is based on a measurement of CP-sensitive angular observables defined by the
visible decay products of τ -leptons produced in Higgs boson
decays. The analysis uses 139 fb−1 of proton–proton collision data recorded at a centre-of-mass energy of √s =
13 TeV with the ATLAS detector at the Large Hadron Collider. Contributions from CP-violating interactions between
the Higgs boson and τ -leptons are described by a single mixing angle parameter φτ in the generalised Yukawa interaction. Without constraining the H → τ τ signal strength to
its expected value under the Standard Model hypothesis, the
mixing angle φτ is measured to be 9◦±16◦, with an expected
value of 0◦ ± 28◦ at the 68% confidence level. The pure CPodd hypothesis is disfavoured at a level of 3.4 standard deviations. The results are compatible with the predictions for
the Higgs boson in the Standard Model.
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Genre | |
Type | |
Language |
eng
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Date Available |
2024-01-02
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Provider |
Vancouver : University of British Columbia Library
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Rights |
Attribution 4.0 International (CC BY 4.0)
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DOI |
10.14288/1.0438362
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URI | |
Affiliation | |
Citation |
The European Physical Journal C. 2023 Jul 04;83(7):563
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Publisher DOI |
10.1140/epjc/s10052-023-11583-y
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Peer Review Status |
Reviewed
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Scholarly Level |
Faculty; Researcher
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Copyright Holder |
The Author(s)
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Rights URI | |
Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
Attribution 4.0 International (CC BY 4.0)