Production of extra quarks decaying to Dark Matter beyond the Narrow Width Approximation at the LHC

Abstract

This paper explores the effects of finite width in processes of pair production of an extra heavy quark with charge 2/3 (top partner) and its subsequent decay into a bosonic Dark Matter (DM) candidate -- either scalar or vector -- and SM up-type quarks at the Large Hadron Collider (LHC). This dynamics has been ignored so far in standard experimental searches of heavy quarks decaying to DM and we assess herein the regions of validity of current approaches, based on the assumption that the extra quarks have a narrow width. Further, we discuss the configurations of masses, widths and couplings where the latter breaks down.

arXiv comment20 pages, 16 figures. Version accepted by PRD

References in corpus (35)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• A Brief Introduction to PYTHIA 8.1
• New Generation of Parton Distributions with Uncertainties from Global QCD Analysis
• DELPHES 3, A modular framework for fast simulation of a generic collider experiment
• FeynRules 2.0 - A complete toolbox for tree-level phenomenology
• MadGraph 5 : Going Beyond
• UFO - The Universal FeynRules Output
• Bounds on Universal Extra Dimensions
• -- HATHOR -- HAdronic Top and Heavy quarks crOss section calculatoR
• Is the Lightest Kaluza-Klein Particle a Viable Dark Matter Candidate?
• TeV Symmetry and the Little Hierarchy Problem
• Uncertainties on alpha_S in global PDF analyses and implications for predicted hadronic cross sections
• Little Hierarchy, Little Higgses, and a Little Symmetry
• Search for new phenomena in final states with an energetic jet and large missing transverse momentum in pp collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Phenomenology of the Littlest Higgs with T-Parity
• T Parity and the Littlest Higgs
• CheckMATE 2: From the model to the limit
• Electroweak Precision Constraints on the Littlest Higgs Model with T Parity
• Search for new phenomena in final states with an energetic jet and large missing transverse momentum in $pp$ collisions at $\sqrt{s}=13$ TeV using the ATLAS detector
• Fermions on an Interval: Quark and Lepton Masses without a Higgs
• Top Partners in Little Higgs Theories with T-parity
• Search for squarks and gluinos in final states with jets and missing transverse momentum at $\sqrt{s}=$ 13 TeV with the ATLAS detector
• A Dark Matter candidate from Lorentz Invariance in 6 Dimensions
• Direct Bounds on Heavy Top-Like Quarks With Standard and Exotic Decays
• Production of extra quarks at the Large Hadron Collider beyond the Narrow Width Approximation
• Framework for Model Independent Analyses of Multiple Extra Quark Scenarios
• Search for gluinos in events with an isolated lepton, jets and missing transverse momentum at $\sqrt{s}$ = 13 TeV with the ATLAS detector
• LHC Missing-Transverse-Energy Constraints on Models with Universal Extra Dimensions
• Towards a model-independent approach to the analysis of interference effects in pair production of new heavy quarks
• Scalar versus fermionic top partner interpretations of $t\bar{t}+E_T^{\mathrm{miss}}$ searches at the LHC
• Constraints on sneutrino dark matter from LHC Run 1
• XQCAT: eXtra Quark Combined Analysis Tool
• Simplified models for same-spin new physics scenarios

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