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Non-thermal dark matter production from the electroweak phase transition: Multi-TeV WIMPs and "baby-zillas"

par Falkowski, Adam;No Redondo, Jose Miguel
Référence The Journal of high energy physics, 2013, 2, 034
Publication Publié, 2013

Article révisé par les pairs

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Résumé :

Particle production at the end of a first-order electroweak phase transition may be rather generic in theories beyond the standard model. Dark matter may then be abundantly produced by this mechanism if it has a sizable coupling to the Higgs field. For an electroweak phase transition occuring at a temperature T EW ~ 50-100 GeV, non- thermally generated dark matter with mass M X > TeV will survive thermalization after the phase transition, and could then potentially account for the observed dark matter relic density in scenarios where a thermal dark matter component is either too small or absent. Dark matter in these scenarios could then either be multi-TeV WIMPs whose relic abundace is mostly generated at the electroweak phase transition, or "Baby-Zillas" with mass MGUT ≫ M X ≫ vEW that never reach thermal equilibrium in the early universe. © 2013 SISSA.