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• W2607491584 abstract "The determination of the CP nature of the Higgs coupling to top quarks is addressed in this paper, using $t{bar t} h$ events produced in $sqrt{s} = 13$ TeV proton-proton collisions at the LHC. Dileptonic final states are employed, with two oppositely charged leptons and four jets, corresponding to the decays $trightarrow bW^+ rightarrow b ell^+nu_ell$, $bar{t}rightarrow bar{b}W^- rightarrow bar{b} ell^-bar{nu}_ell$ and $hrightarrow bbar{b}$. Pure scalar ($h=H$), pure pseudo-scalar ($h=A$) and CP-violating Higgs boson signal events, generated with MadGraph5_aMC@NLO, are fully reconstructed through a kinematic fit. We furthermore generate samples that have both a CP-even and a CP-odd component in the $t bar t h$ coupling in order to probe the ratio of the two components. New angular distributions of the decay products, as well as CP angular asymmetries, are explored in order to separate the scalar from the pseudo-scalar components of the Higgs boson and reduce the contribution from the dominant irreducible background, $t{bar t}b{bar b}$. Significant differences between the angular distributions and asymmetries are observed, even after the full kinematic fit reconstruction of the events, allowing to define the best observables for a global fit of the Higgs couplings parameters." @default.
• W2607491584 created "2017-04-28" @default.
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• W2607491584 date "2017-07-17" @default.
• W2607491584 modified "2023-10-15" @default.
• W2607491584 title "Probing the <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi>C</mml:mi><mml:mi>P</mml:mi></mml:math> nature of the Higgs coupling in <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi>t</mml:mi><mml:mover accent=true><mml:mi>t</mml:mi><mml:mo stretchy=false>¯</mml:mo></mml:mover><mml:mi>h</mml:mi></mml:math> events at the LHC" @default.
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• W2607491584 doi "https://doi.org/10.1103/physrevd.96.013004" @default.
• W2607491584 hasPublicationYear "2017" @default.
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