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Interacting Hot Dark Matter [PDF]

Physical Review D, 1997
We discuss the viability of a light particle ($\sim 30$ eV neutrino) with strong self-interactions as a dark matter candidate. The interaction prevents the neutrinos from free-streaming during the radiation dominated regime so galaxy sized density ...
Atrio-Barandela, Fernando, Davidson, Sacha   +1 more
core   +7 more sources

Hot QCD and warm dark matter [PDF]

Proceedings of XXIVth International Symposium on Lattice Field Theory — PoS(LAT2006), 2006
One of the possible explanations for the dark matter needed in the standard cosmological model is so-called warm dark matter, in the form of right-handed ("sterile") neutrinos with a mass in the keV range.
Laine, M.
core   +8 more sources

Model of the Galaxy with Hot Dark Matter [PDF]

Open Astronomy, 2018
The model of the galaxy is considered as a structure of the baryonic matter embedded into the hot dark matter. The dark matter is supposed to come into being from the decaying matter after the epoch of structure formation.
Khokhlov Dmitri L.
doaj   +4 more sources

Hidden Hot Dark Matter as Cold Dark Matter [PDF]

, 2009
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.
Sigurdson, Kris
core   +6 more sources

Axion hot dark matter bounds

, 2008
We derive cosmological limits on two-component hot dark matter consisting of neutrinos and axions. We restrict the large-scale structure data to the safely linear regime, excluding the Lyman-alpha forest.
Hannestad, S., Mirizzi, A., Raffelt, G., Wong, Y. Y. Y.   +3 more
core   +5 more sources

Indirect detection of hot dark matter

Journal of High Energy Physics
Cosmologically stable, light particles that came into thermal contact with the Standard Model in the early universe may persist today as a form of hot dark matter.
Jeff A. Dror, Pearl Sandick, Barmak Shams Es Haghi, Fengwei Yang   +3 more
doaj   +4 more sources

Hot and heavy dark matter from a weak scale phase transition [PDF]

SciPost Physics, 2023
We point out that dark matter which is produced non-adiabatically in a phase transition (PT) with fast bubble walls receives a boost in velocity which leads to long free-streaming lengths.
Iason Baldes, Yann Gouttenoire, Filippo Sala
doaj   +2 more sources

Dark matter as a heavy thermal hot relic [PDF]

Physics Letters B, 2020
If, during the early Universe epoch, the dark matter particle thermalizes in a hidden sector which does not thermalize with the Standard Model thermal bath, its relativistic thermal decoupling can easily lead to the observed relic density, even if the ...
Thomas Hambye, Matteo Lucca, Laurent Vanderheyden   +2 more
doaj   +4 more sources

THE HOT DARK MATTER MODEL: FURTHER INVESTIGATION

Odessa Astronomical Publications, 2020
e outer region with the dominant hot dark matter (the parabolic orbit of the test particle). It was assumed that the hot dark matter consists of hypothetical Planck neutrinos arising in the decay of the protons at the Planck scale.
D. L. Khokhlov
doaj   +4 more sources

Violation of universal lower bound for the shear viscosity to entropy density ratio in dark energy dominated accretion

European Physical Journal C: Particles and Fields, 2019
The universal lower bound of the ratio of shear viscosity to entropy density is suggested by the string theory and gauge duality for any matter. We examined the ratio of shear viscosity to entropy density for viscous accretion flow towards a central ...
Sandip Dutta, Ritabrata Biswas
doaj   +3 more sources