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Snowmass2021 Cosmic Frontier White Paper: Ultraheavy particle dark matter
Daniel Carney, Nirmal Raj, Yang Bai +25
We outline the unique opportunities and challenges in the search for "ultraheavy" dark matter candidates with masses between roughly and the Planck scale $m_{\rm pl}…
Gravitational production of super-Hubble-mass particles: an analytic approach
Daniel J. H. Chung, Edward W. Kolb, Andrew J. Long
Through a mechanism similar to perturbative particle scattering, particles of mass larger than the Hubble expansion rate during inflation can be gravitationa…
Dibaryons cannot be the dark matter
Edward W. Kolb, Michael S. Turner
The hypothetical flavor-singlet dibaryon state with strangeness has been discussed as a dark-matter candidate capable of explaining the curious 5-to-1 ratio of the…
The Fermionic Dark Matter Higgs Portal: an effective field theory approach
Michael A. Fedderke, Jing-Yuan Chen, Edward W. Kolb +1
We consider fermionic (Dirac or Majorana) cold thermal relic dark-matter coupling to standard-model particles through the effective dimension-5 Higgs portal operators $Λ^{-1} \ \ma…
Gamma-ray constraints on dark-matter annihilation to electroweak gauge and Higgs bosons
Michael A. Fedderke, Edward W. Kolb, Tongyan Lin +1
Dark-matter annihilation into electroweak gauge and Higgs bosons results in -ray emission. We use observational upper limits on the fluxes of both line and continuum -rays fr…
Dark matter coupling to electroweak gauge and Higgs bosons: an effective field theory approach
Jing-Yuan Chen, Edward W. Kolb, Lian-Tao Wang
If dark matter is a new species of particle produced in the early universe as a cold thermal relic (a weakly-interacting massive particle-WIMP), its present abundance, its scatteri…