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Pierluca Carenza1, Roman Pasechnik2, Gustavo Salinas1

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This summary is machine-generated.

Dark matter may consist of stable scalar glueballs from a dark SU(3) gauge theory. This study calculates their relic abundance using a thermal effective theory and lattice simulations, yielding a prediction significantly lower than previous estimates.

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Area of Science:

  • * Cosmology
  • * Particle Physics
  • * Quantum Field Theory

Background:

  • * The composition of dark matter remains a significant mystery in modern physics.
  • * Scalar glueballs, predicted by Quantum Chromodynamics (QCD)-like theories, are a potential dark matter candidate.
  • * Previous studies on glueball dark matter often employed simplified models lacking strong-coupling dynamics.

Purpose of the Study:

  • * To investigate the possibility of dark matter being composed of stable scalar glueballs within a confining dark SU(3) gauge theory.
  • * To calculate the relic abundance of these dark glueballs for the first time using a thermal effective theory that incorporates strong-coupling dynamics.
  • * To provide a more accurate prediction for the glueball relic abundance by utilizing lattice simulation data.

Main Methods:

  • * Development of a thermal effective theory to describe the dynamics of scalar glueballs.
  • * Incorporation of strong-coupling dynamics relevant to confining gauge theories.
  • * Fitting an effective potential for glueballs using data from lattice simulations.
  • * Calculation of the relic abundance based on the fitted potential and cosmological parameters.

Main Results:

  • * A novel prediction for the relic abundance of dark glueballs is derived: 0.12ζ_{T}^{-3}Λ/(137.9 ext{ eV})≲Ωh^{2}≲0.12ζ_{T}^{-3}Λ/(82.7 ext{ eV}).
  • * The predicted relic abundance is found to be approximately an order of magnitude smaller than previously reported values in the literature.
  • * The uncertainty in the prediction is primarily attributed to the fitting of lattice simulation data.

Conclusions:

  • * Stable scalar glueballs from a confining dark SU(3) gauge theory are a viable dark matter candidate with a potentially lower relic abundance than previously thought.
  • * The developed theoretical framework, accounting for strong-coupling dynamics, offers a more consistent approach to exploring strongly coupled dark sectors.
  • * The methodology can be extended to explore dark matter implications for different gauge groups and cosmological histories.