Testing the Littlest Higgs Model with T-parity at the Large Hadron Collider

Abstract

In the framework of the littlest Higgs model with T-parity (LHT), we study the production processes of T-even (T_+) and T-odd (T_-) partners of the top quark at the Large Hadron Collider (LHC). We show that the signal events can be distinguished from the standard-model backgrounds, and that information about mass and mixing parameters of the top partners can be measured with relatively good accuracies. With the measurements of these parameters, we show that a non-trivial test of the LHT can be performed. We also discuss a possibility to reconstruct the thermal relic density of the lightest T-odd particle A_H using the LHC results, and show that the scenario where A_H becomes dark matter may be checked.

26 pages, 6 figures

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• Model Independent Framework for Searches of Top Partners
• On the Interpretation of a Possible $\sim 750$ GeV Particle Decaying into $\gamma \gamma$
• Physics searches at the LHC
• Search for new phenomena in events with same-charge leptons and $b$-jets in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
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• LHC Signatures of Warped-space Vectorlike Quarks
• Discriminating dark matter candidates using direct detection
• Single production of the top partners at high energy colliders
• Single top partner production in the Higgs to diphoton channel in the Littlest Higgs Model with $T$-parity
• Higgs and Z-boson FCNC decays correlated with B-meson decays in littlest Higgs model with T-parity
• The production and decay of the top partner $T$ in the left-right twin higgs model at the ILC and CLIC
• Vector Leptons in the Higgs Triplet Model
• Cancellation in Dark Matter-Nucleon Interactions: the Role of Non-Standard-Model-like Yukawa Couplings
• Looking for a vectorlike B quark at LHC using jet substructure
• LHC signatures of vector-like quarks
• Precision Measurements of Little Higgs Parameters at the International Linear Collider
• Vector-like quarks and heavy coloured bosons at the LHC
• Testing Little Higgs Mechanism at Future Colliders
• tbW vertex in the Littlest Higgs Model with T-parity
• The impossibility of heavy neutrino dark matter in the Littlest Higgs Model with T-parity: constraints from direct search
• Coupling Extraction From Off-Shell Cross-sections
• On-shell $WW\gamma$ vertex in the T-Parity and non T-Parity Littlest Higgs model
• Testing the Littlest Higgs Model with T-parity in Bottom Quark Pair Production at High Energy Photon Colliders
• Dark Matter and Collider Searches in $S_3$-Symmetric 2HDM with Vector Like Leptons
• Dissecting new physics models through kinematic edges
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• Operators in ultraviolet completions for collective symmetry breaking
• Signals for vector-like leptons in an $S_3$-symmetric 2HDM at ILC
• Phenomenology of extra quarks at the LHC