Phenomenology of Light Fermionic Asymmetric Dark Matter

Abstract

Asymmetric dark matter (ADM) has been an attractive possibility attempting to explain the observed ratio of baryon to dark matter abundance in the universe. While a bosonic ADM is constrained by the limits from existence of old neutron stars, a fermionic ADM requires an additional light particle in order to annihilate its symmetric component in the early universe. We revisit the phenomenology of a minimal GeV scale fermionic ADM model including a light scalar state. The current constraints on this scenario from cosmology, dark matter direct detection, flavour physics and collider searches are investigated in detail. We estimate the future reach on the model parameter space from next-generation dark matter direct detection experiments, Higgs boson property measurements and search for light scalars at the LHC, as well as the determination of Higgs invisible branching ratio at the proposed ILC.

31 pages, 7 figures; v2: comments and references added, version as published in JHEP

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• Bounds on self-interacting fermion dark matter from observations of old neutron stars
• Self-Interacting Dark Matter through the Higgs Portal
• Constraining Dark Matter Models with a Light Mediator from PandaX-II Experiment
• On the Direct Detection of Dark Matter Annihilation
• Asymmetric Dark Matter Models in SO(10)
• Common origin of baryon asymmetry, dark matter and neutrino mass
• Does asymmetric dark matter always lead to an anti-neutrino signal?
• Scope of strongly self-interacting thermal WIMPs in a minimal $U(1{)}_D$ extension and its future prospects
• Continuous Flavor Symmetries and the Stability of Asymmetric Dark Matter
• Indian Contributions to LHC Theory
• Prospects for exotic $h\to 4\tau$ decays in single and di-Higgs boson production at the LHC and future hadron colliders