Unraveling the CP phase of top-Higgs coupling in associated production at the LHC

Abstract

We study the sensitivity of top polarization observables to the CP phase ${\zeta }_t$ in the top Yukawa coupling in the process $pp\to thj$ at the 14 TeV high-luminosity run of the Large Hadron Collider (HL-LHC). We calculate the top polarization in this process as well as an azimuthal asymmetry of the charged lepton arising from the decay of the top in the lab frame. We find that the dependence of this lab-frame azimuthal asymmetry on the phase ${\zeta }_t$ closely resembles the dependence of the top polarization on ${\zeta }_t$. As compared to the cross section, which is sensitive to ${\zeta }_t$ for larger values, the lepton azimuthal asymmetry can provide a sensitive measurement of ${\zeta }_t$ for smaller values.

8 pages, 6 figures, Matches Published Version in Phys. Lett. B

References in corpus (13)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Higgs characterisation at NLO in QCD: CP properties of the top-quark Yukawa interaction
• Boosting the Direct CP Measurement of the Higgs-Top Coupling
• Lab-frame observables for probing the top-Higgs interaction
• Lepton distribution as a probe of new physics in production and decay of the t quark and its polarization
• Measurement of the top quark mass in the $t\bar{t}\to \mathrm{lepton}+\mathrm{jets}$ and $t\bar{t}\to \mathrm{dilepton}$ channels using $\sqrt{s}=7$ TeV ATLAS data
• Higgcision Updates 2014
• On measurement of top polarization as a probe of $t\bar{t}$ production mechanisms at the LHC
• Anomalous Top-Higgs Couplings and Top Polarisation in Single Top and Higgs Associated Production at the LHC
• Pseudoscalar top-Higgs coupling: Exploration of $\mathrm{CP}$-odd observables to resolve the sign ambiguity
• Enhanced $thj$ signal at the LHC with $h\to \gamma \gamma$ decay and $\mathcal{C}\mathcal{P}$-violating top-Higgs coupling

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• Higgs Pair Productions in the CP-violating Two-Higgs-Doublet Model
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