Hitting two BSM particles with one lepton-jet: search for a top partner decaying to a dark photon, resulting in a lepton-jet

Abstract

A maverick top partner model, decaying to a dark photon was suggested. The dark photon decays to two overlapping electrons for dark photon masses of $\approx 100$ GeV, and results in a so-called lepton-jet. The event includes a top quark as well, which results in events with two boosted objects, one heavy and the other light. We propose a search strategy exploiting the unique signal topology. We show that for a set of kinematic selections, both in hadronic and leptonic decay channel of the SM top quark, almost all background can be eliminated, leaving enough signal events up to top partner mass of about 3 TeV for the search to be viable at the LHC.

arXiv commentPrepared for submission to SciPost Physics (updated in response to referee report)

References in corpus (30)

• The anti-k_t jet clustering algorithm
• An Introduction to PYTHIA 8.2
• A Unified Approach to the Classical Statistical Analysis of Small Signals
• FeynRules 2.0 - A complete toolbox for tree-level phenomenology
• The Waning of the WIMP? A Review of Models, Searches, and Constraints
• New Fixed-Target Experiments to Search for Dark Gauge Forces
• Parton distributions with QED corrections
• Illuminating Dark Photons with High-Energy Colliders
• The Dark Photon
• Robust Independent Validation of Experiment and Theory: Rivet version 3
• Jet Substructure at the Large Hadron Collider: Experimental Review
• LHC Signals for a SuperUnified Theory of Dark Matter
• Electron efficiency measurements with the ATLAS detector using 2012 LHC proton-proton collision data
• Hidden Higgs Decaying to Lepton Jets
• On the Interpretation of Top Partners Searches
• Lepton Jets in (Supersymmetric) Electroweak Processes
• Dark photon production through positron annihilation in beam-dump experiments
• Searches for dark photons at accelerators
• Differential top-antitop cross-section measurements as a function of observables constructed from final-state particles using pp collisions at $\sqrt{s}=7$ TeV in the ATLAS detector
• Search for single production of a vector-like T quark decaying to a Z boson and a top quark in proton-proton collisions at $\sqrt{s}=$13 TeV
• A search for pair production of new light bosons decaying into muons in proton-proton collisions at 13 TeV
• Search for single production of vector-like quarks decaying into $Wb$ in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• A search for prompt lepton-jets in $pp$ collisions at $\sqrt{s}=$ 8 TeV with the ATLAS detector
• Search for single production of vector-like quarks decaying to a top quark and a W boson in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Searching for Dark Photons with Maverick Top Partners
• The Search for Dark Matter
• Search for Light Resonances Decaying into Pairs of Muons as a Signal of New Physics
• Simplified Models for Higgs Physics: Singlet Scalar and Vector-like Quark Phenomenology
• Loop Induced Single Top Partner Production and Decay at the LHC
• Shedding Light on Top Partner at the LHC

Cited by in corpus (3)

• Exploring maverick top partner decays at the LHC
• Dark Sector Showers in the Lund Jet Plane
• Machine learning tagged boosted dark photon: A signature of fermionic portal matter at the LHC