- Typ
- Artikel in einem Journal
- Gebiet
- ATLAS
- Autor
- G. Aad, …, C. Grefe, M. Hansen, P. Bechtle, K. Desch et al. (für die ATLAS-Kollaboration)
- Titel
- Measuring CP properties of Higgs boson interactions with tau leptons with the ATLAS detector
- Datum
- 2022-12
- Reportnummer
- CERN-EP-2022-244
- Kurzfassung
- 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
-lepton decays, where at least one hadronic decay is required. 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 assuming the Standard Model hypothesis for the H→ττ
signal strength, the mixing angle ϕτ
is measured to be 9∘±16∘
, with an expected value of 0∘±28∘
at the 68% confidence level. The pure CP
-odd 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.
- Link
- https://arxiv.org/abs/2212.05833
- Journal
- https://doi.org/10.48550/arXiv.2212.05833