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Hidden Hot Dark Matter as Cold Dark Matter

Sigurdson, Kris (2009) Hidden Hot Dark Matter as Cold Dark Matter. . (Submitted)

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We show that hidden hot dark matter, hidden-sector dark matter with interactions that decouple when it is relativistic, is a viable dark matter candidate provided it has never been in thermal equilibrium with the particles of the standard model. This hidden hot dark matter may reheat to a lower temperature and number density than the visible Universe and thus account, simply with its thermal abundance, for all the dark matter in the Universe while evading the typical constraints on hot dark matter arising from structure formation. We find masses ranging from ~3 keV to ~10 TeV. While never in equilibrium with the standard model, this class of models may have unique observational signatures in the matter power spectrum or via extra-weak interactions with standard model particles.

Item Type:Report or Paper (Discussion Paper)
Related URLs:
URLURL TypeDescription Paper
Sigurdson, Kris0000-0002-6729-0765
Additional Information:Submitted on 14 Dec 2009. This work is supported by a Natural Sciences and Engineering Research Council (NSERC) of Canada Discovery Grant. KS would like to thank the Aspen Center for Physics, the W. M. Keck Institute for Space Studies at Caltech, and the Perimeter Institute for Theoretical Physics, where part of this work were completed, for their hospitality.
Group:Keck Institute for Space Studies
Funding AgencyGrant Number
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
Aspen Center for PhysicsUNSPECIFIED
Keck Institute for Space Studies (KISS)UNSPECIFIED
Perimeter Institute for Theoretical PhysicsUNSPECIFIED
Record Number:CaltechAUTHORS:20160218-142204181
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:64586
Deposited By: Colette Connor
Deposited On:20 Feb 2016 00:51
Last Modified:03 Oct 2019 09:39

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