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Paper   IPM / P / 16358
School of Physics
  Title:   Matter and dark matter asymmetry from a composite Higgs model
  Author(s):  M. Ahmadvand
  Status:   Preprint
  Year:  2020
  Supported by:  IPM
We propose a low scale leptogenesis scenario in the framework of composite Higgs models supplemented with singlet heavy neutrinos. One of the neutrinos can also be considered as a dark matter candidate whose stability is guaranteed by a discrete \mathbbZ2 symmetry of the model. In the spectrum of the strongly coupled system, bound states heavier than the pseudo Nambu-Goldstone Higgs boson can exist. Due to the decay of these states to heavy right-handed neutrinos, an asymmetry in the visible and dark sector is simultaneously generated. The resulting asymmetry is transferred to the standard model leptons which interact with visible right-handed neutrinos. We show that the sphaleron-induced baryon asymmetry can be provided at the TeV scale for resonant bound states. Furthermore, depending on the coupling strength of dark neutrino interaction, a viable range of the dark matter mass is allowed in the model.

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