Implications of the Little Higgs Dark Matter and T-odd Fermions

Abstract

We study the phenomenology of dark matter in the Littlest Higgs model with T-parity after the discovery of Higgs boson. We analyze the relic abundance of dark matter, focusing on the effects of coannihilaitons with T-odd fermions. After determining the parameter space that predicts the correct relic abundance measured by WMAP and Planck collaborations, we evaluate the elastic scattering cross section between dark matter and nucleon. In comparison with experimental results, we find that the lower mass of dark matter is constrained mildly by LUX 2013 while the future XENON experiment has potential to explore most of the parameter space for both T-odd lepton and T-odd quark coannihilation scenarios. We also study the collider signatures of T-odd fermion pair production at the LHC. Even though the production cross sections are large, it turns out very challenging to search for these T-odd fermions directly at the collider because the visible charged leptons or jets are very soft. Furthermore, we show that, with an extra hard jet radiated out from the initial state, the T-odd quark pair production can contribute significantly to mono-jet plus missing energy search at the LHC.

References in corpus (8)

• First results from the LUX dark matter experiment at the Sanford Underground Research Facility
• Dark Matter Results from 225 Live Days of XENON100 Data
• Novel Collider Signatures for Little Higgs Dark Matter Models
• Can the 125 GeV Higgs be the Little Higgs?
• Littlest Higgs with T-parity: Status and Prospects
• Phenomenology of Mirror Fermions in the Littlest Higgs Model with T-Parity
• LHC signals of T-odd heavy quarks in the Littlest Higgs model
• Dijet signals of the Little Higgs model with T-parity

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• Associated production of single top and Higgs at the LHC in the littlest Higgs model with T-parity
• Search for inelastic WIMP-iodine scattering with COSINE-100
• Little Higgs Dark Matter after PandaX-II/LUX 2016 and LHC Run-1
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