Searching for Dark Matter with $t\overline{t}$ Resonance

Abstract

Many models containing particles which are candidates for dark matter, assume the standard model particles and the dark matter candidates are mediated by a spin-0 particle. At the LHC, one can use these models for dark matter searches. One of the possible approaches for the search of these models is by considering the decay of the spin-0 particle to a pair of $t\bar{t}$, thus modifying the pattern of the top quark pair invariant mass spectrum. This search suggests a good sensitivity in a parameter space different than the more traditional searches. We examine this sensitivity and put limits on two benchmark models containing candidates for dark matter, using previous ATLAS results. It was found that when the mediator mass ($m_{Y_0}$) and the dark matter candidate mass ($m_{\chi }$) have values of $m_{Y_0}\sim 2\cdot m_{\chi }$, mediator masses in the range of $[400,600]$ GeV are excluded. We compare our results to direct detection experiments and show that we gain sensitivity for new regions which are not covered by other searches.

References in corpus (30)

• Particle Dark Matter: Evidence, Candidates and Constraints
• Supersymmetric Dark Matter
• Theory and phenomenology of two-Higgs-doublet models
• Results from a search for dark matter in the complete LUX exposure
• Minimal Flavour Violation: an effective field theory approach
• The CP-conserving two-Higgs-doublet model: the approach to the decoupling limit
• First Dark Matter Search Results from the XENON1T Experiment
• Dark Matter Benchmark Models for Early LHC Run-2 Searches: Report of the ATLAS/CMS Dark Matter Forum
• WIMP-Search Results from the Second CDMSlite Run
• Scalar Simplified Models for Dark Matter
• Top pair invariant mass distribution: a window on new physics
• Simplified dark matter models with two Higgs doublets: I. Pseudoscalar mediators
• Higgs Decay to Top Quarks at Hadron Colliders
• A search for $t\bar{t}$ resonances using lepton-plus-jets events in proton-proton collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Search for anomalous t t-bar production in the highly-boosted all-hadronic final state
• Mono-Higgs Detection of Dark Matter at the LHC
• Search for heavy particles decaying into top-quark pairs using lepton-plus-jets events in proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Search for heavy Higgs bosons $A/H$ decaying to a top quark pair in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Search for dark matter produced in association with bottom or top quarks in $\sqrt{s}$ = 13 TeV pp collisions with the ATLAS detector
• Constraining Dark Matter Models with a Light Mediator from PandaX-II Experiment
• Dark matter production through loop-induced processes at the LHC: the s-channel mediator case
• Search for dark matter produced in association with a Higgs boson decaying to a pair of bottom quarks in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Signal background interference effects in heavy scalar production and decay to a top-anti-top pair
• 2HDM portal for Singlet-Doublet Dark Matter
• Search for dark matter produced in association with heavy-flavor quarks in proton-proton collisions at sqrt(s) = 13 TeV
• Two Higgs Doublet Dark Matter Portal
• Scalar Dark Matter in Leptophilic Two-Higgs-Doublet Model
• A light scalar dark matter extension of the type-II two-Higgs-doublet model
• DM+$b\bar{b}$ simulations with DMSimp: an update
• Spin-$0^{\pm }$ portal induced Dark Matter

Cited by in corpus (1)

• Search for heavy neutral Higgs bosons decaying into a top quark pair in 140 fb${}^{-1}$ of proton-proton collision data at $\sqrt{s}=13$ TeV with the ATLAS detector