Non-thermal Dark Matter Production from the Electroweak Phase Transition: Multi-TeV WIMPs and "Baby-Zillas"

2012/11/23 by Adam Falkowski, Jose Miguel No · 2 citations
Physics and Astronomy · #astro-ph.CO #hep-ph

paper · pdf · doi:10.1007/jhep02(2013)034

arxiv created 2012/11/23 · arxiv updated 2015/06/12

Abstract

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 M_GUT >> M_X >> v_EW that never reach thermal equilibrium in the early universe.

Cited by

• Abundant production of scalars and axions from phase transition bubble expansion
• Bubble wall velocity from Kadanoff-Baym equations: fluid dynamics and microscopic interactions

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