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Roman Pasechnik

Senior lecturer

Typical working day..

Glueball Dark Matter Revisited

Author

  • Pierluca Carenza
  • Roman Pasechnik
  • Gustavo Salinas
  • Zhi Wei Wang

Summary, in English

We revisit the possibility that dark matter is composed of stable scalar glueballs of a confining dark SU(3) gauge theory coupled only to gravity. The relic abundance of dark glueballs is studied for the first time in a thermal effective theory accounting for strong-coupling dynamics. An important ingredient of our analysis is the use of an effective potential for glueballs that is fitted by lattice simulations. We predict the relic abundance to be in the range 0.12ζT-3Λ/(137.9 eV)≲ωh2≲0.12ζT-3Λ/(82.7 eV), with Λ being the confinement scale, ζT the visible-to-dark sector temperature ratio, and the uncertainty is coming from the fit to lattice data. This prediction is an order of magnitude smaller than the existing glueball abundance results in the literature. Our framework can be easily generalized to different gauge groups and modified cosmological histories paving the way toward consistent exploration of strongly coupled dark sectors and their cosmological implications.

Department/s

  • Theoretical Particle Physics - Undergoing reorganization

Publishing year

2022-12-23

Language

English

Publication/Series

Physical Review Letters

Volume

129

Issue

26

Document type

Journal article

Publisher

American Physical Society

Topic

  • Subatomic Physics

Status

Published

ISBN/ISSN/Other

  • ISSN: 0031-9007