2014/02/27 by Chuan-Ren Chen, Ming-Che Lee, Ho-Chin Tsai
Computer Science · Physics and Astronomy · #CMB cold spot #Computational Physics and Python Applications #Dark Matter and Cosmic Phenomena #Dark matter #Fermion #Higgs boson #Lepton #Missing energy #Neutralino #Parameter space #Particle physics theoretical and experimental studies #Phenomenology (philosophy) #Planck #hep-ph
paper · pdf · doi:10.1007/jhep06(2014)074
arxiv created 2014/02/27 · openalex publication_date 2014/06/01 · arxiv updated 2015/06/18 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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.