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    Test of CP invariance in vector-boson fusion production of the Higgs boson using the Optimal Observable method in the ditau decay channel with the ATLAS detector

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    Author
    Aad, G; Abbott, B; Abdinov, O; Abdallah, J; Abeloos, B; Aben, R; Abolins, M; Aben, R; Abolins, M; AbouZeid, OS; ...
    Date
    2016-11-29
    Source Title
    European Physical Journal C: Particles and Fields
    Publisher
    SPRINGER
    University of Melbourne Author/s
    Barberio, Luigia; Kubota, Takashi; Urquijo, Phillip; Taylor, Geoffrey; Volpi, Matteo; ZANZI, DANIELE; Nuti, Francesco; Milesi, Marco; Dawe, Edmund; Petersen, Brian; ...
    Affiliation
    School of Physics
    Metadata
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    Document Type
    Journal Article
    Citations
    Aad, G., Abbott, B., Abdinov, O., Abdallah, J., Abeloos, B., Aben, R., Abolins, M., Aben, R., Abolins, M., AbouZeid, O. S., Abraham, N. L., Abramowicz, H., Abreu, H., Abreu, R., Abulaiti, Y., Acharya, B. S., Adamczyk, L., Adams, D. L., Adelman, J. ,... Zwalinski, L. (2016). Test of CP invariance in vector-boson fusion production of the Higgs boson using the Optimal Observable method in the ditau decay channel with the ATLAS detector. EUROPEAN PHYSICAL JOURNAL C, 76 (12), https://doi.org/10.1140/epjc/s10052-016-4499-5.
    Access Status
    Open Access
    URI
    http://hdl.handle.net/11343/257672
    DOI
    10.1140/epjc/s10052-016-4499-5
    Abstract
    A test of CP invariance in Higgs boson production via vector-boson fusion using the method of the Optimal Observable is presented. The analysis exploits the decay mode of the Higgs boson into a pair of [Formula: see text] leptons and is based on 20.3 [Formula: see text] of proton-proton collision data at [Formula: see text] = 8 [Formula: see text] collected by the ATLAS experiment at the LHC. Contributions from CP-violating interactions between the Higgs boson and electroweak gauge bosons are described in an effective field theory framework, in which the strength of CP violation is governed by a single parameter [Formula: see text]. The mean values and distributions of CP-odd observables agree with the expectation in the Standard Model and show no sign of CP violation. The CP-mixing parameter [Formula: see text] is constrained to the interval [Formula: see text] at 68% confidence level, consistent with the Standard Model expectation of [Formula: see text].

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