1. Conformal freeze-in of dark matter
- Author
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Maxim Perelstein, Gowri Kurup, and Sungwoo Hong
- Subjects
Physics ,Quark ,Particle physics ,010308 nuclear & particles physics ,Conformal field theory ,media_common.quotation_subject ,Electroweak interaction ,Dark matter ,High Energy Physics::Phenomenology ,FOS: Physical sciences ,Astrophysics::Cosmology and Extragalactic Astrophysics ,01 natural sciences ,Universe ,Standard Model ,High Energy Physics - Phenomenology ,High Energy Physics - Phenomenology (hep-ph) ,Conformal symmetry ,0103 physical sciences ,Higgs boson ,010306 general physics ,media_common - Abstract
We present the conformal freeze-in (COFI) scenario for dark matter production. At high energies, the dark sector is described by a gauge theory flowing towards a Banks-Zaks fixed point, coupled to the standard model via a non-renormalizable portal interaction. At the time when the dark sector is populated in the early universe, it is described by a strongly coupled conformal field theory. As the universe cools, cosmological phase transitions in the standard model sector, either electroweak or QCD, induce conformal symmetry breaking and confinement in the dark sector. One of the resulting dark bound states is stable on the cosmological time scales and plays the role of dark matter. With the Higgs portal, the COFI scenario provides a viable dark matter candidate with mass in a phenomenologically interesting 0.1-1 MeV range. With the quark portal, a dark matter candidate with mass around 1 keV is consistent with observations. Conformal bootstrap puts a non-trivial constraint on model building in this case., 6 + 2 pages, 3 figures. Minor changes; version to be published in PRD
- Published
- 2020