Constraining the Strength and CP Structure of Dark Production at the LHC: the Associated Top-Pair Channel

Abstract

We consider the production of dark matter in association with a pair of top quarks, mediated by a scalar or pseudoscalar particle in a generic Simplified Model. We demonstrate that the difference of azimuthal angle between the two leptons $\Delta {\varphi }_{ll}$, in the dileptonic top decay mode, can directly probe the CP-properties of the mediator. We estimate the constraints to strength and CP-structure of dark matter production for these well-motivated Simplified Models from the LHC Run II.

7 pages, 4 figures

References in corpus (27)

• Event generation with SHERPA 1.1
• Automatic spin-entangled decays of heavy resonances in Monte Carlo simulations
• Constraints on Dark Matter from Colliders
• The Tevatron at the Frontier of Dark Matter Direct Detection
• Simplified Models for a First Characterization of New Physics at the LHC
• OneLOop: for the evaluation of one-loop scalar functions
• LEP Shines Light on Dark Matter
• Maverick dark matter at colliders
• Automating dipole subtraction for QCD NLO calculations
• Scalar Simplified Models for Dark Matter
• Characterising dark matter searches at colliders and direct detection experiments: Vector mediators
• Deducing the nature of dark matter from direct and indirect detection experiments in the absence of collider signatures of new physics
• Higgs characterisation at NLO in QCD: CP properties of the top-quark Yukawa interaction
• Mass Effects in the Higgs-Gluon Coupling: Boosted vs Off-Shell Production
• Constraining Dark Sectors at Colliders: Beyond the Effective Theory Approach
• On the Validity of the Effective Field Theory for Dark Matter Searches at the LHC Part III: Analysis for the $t$-channel
• How Dark Are Majorana WIMPs? Signals from MiDM and Rayleigh Dark Matter
• Search for dark matter in events with heavy quarks and missing transverse momentum in $pp$ collisions with the ATLAS detector
• Beyond Standard Model calculations with Sherpa
• Fermionic dark matter with pseudo-scalar Yukawa interaction
• Constraining CP-violating Higgs Sectors at the LHC using gluon fusion
• Exploring the Anomalous Higgs-top Couplings
• Mapping monojet constraints onto Simplified Dark Matter Models
• Stop on Top
• Heavy WIMP through Higgs portal at the LHC
• Spying an invisible Higgs
• Enhancing the ttH signal through top-quark spin polarization effects at the LHC

Cited by in corpus (34)

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• When the Machine Chimes the Bell: Entanglement and Bell Inequalities with Boosted $t\bar{t}$
• Dark matter production in association with a single top-quark at the LHC in a two-Higgs-doublet model with a pseudoscalar mediator
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• Direct Higgs-top CP-phase measurement with $t\bar{t}h$ at the 14 TeV LHC and 100 TeV FCC
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• Mono-Higgs signature in fermionic dark matter model
• Simplified Dark Matter Models with Charged Mediators: Prospects for Direct Detection
• Seeking leptoquarks in the $\mathbf{t}\bar{\mathbf{t}}$ plus missing energy channel at the high-luminosity LHC
• CP-violation, Asymmetries and Interferences in $t\bar{t}\varphi$
• Determining the Quantum Numbers of Simplified Models in $t\bar{t}X$ production at the LHC
• Prospects for discovery and spin discrimination of dark matter in Higgs portal DM models and their extensions at 100 TeV $pp$ collider
• Boosting invisible searches via $\mathbf{ZH}$: From the Higgs Boson to Dark Matter Simplified Models
• Determining the space-time structure of bottom-quark couplings to spin-zero particles
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• Search for dark matter produced in association with a single top quark and an energetic $W$ boson in $\sqrt{s}=$ 13 TeV $pp$ collisions with the ATLAS detector
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• Exploring Constraints on Simplified Dark Matter Model Through Flavour and Electroweak Observables
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• Impact of the 125 GeV Higgs boson on the singlet fermion dark matter searches at the LHC
• Top-philic Machine Learning
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• Asymmetries in invisible Dark Matter mediator production associated with $t\bar{t}$ final states