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We introduce a novel nonthermal dark matter production mechanism via vacuum misalignment. This process generates charge asymmetry, creating stable dark matter relics and a light pseudo-scalar particle with cosmological implications.

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Area of Science:

  • Particle Physics
  • Cosmology
  • Dark Matter Physics

Background:

  • The origin of dark matter remains a significant unsolved problem in physics.
  • Existing dark matter production mechanisms often rely on thermal relics or specific particle interactions.
  • Vacuum misalignment offers a compelling alternative framework for generating relic abundances.

Purpose of the Study:

  • To propose and analyze a new nonthermal mechanism for dark matter production.
  • To explore the implications of vacuum misalignment in generating dark matter and charge asymmetry.
  • To demonstrate the viability of this mechanism within a composite Higgs model.

Main Methods:

  • Theoretical modeling of dark matter production via vacuum misalignment.
  • Analysis of charge asymmetry generation at high temperatures and subsequent breaking of U(1)_X.
  • Application and validation of the mechanism within a composite Higgs template model.

Main Results:

  • A novel nonthermal dark matter production mechanism based on vacuum misalignment is established.
  • The mechanism naturally generates a global X-charge asymmetry, with a fraction stored in stable dark matter.
  • A light pseudo-scalar particle (η) is predicted, with potential observable consequences.

Conclusions:

  • Vacuum misalignment provides a viable and versatile mechanism for nonthermal dark matter production.
  • The predicted pseudo-scalar particle has significant implications for cosmology, supernovae, and particle decays.
  • This mechanism offers a new avenue for exploring dark matter origins in various theoretical models.