Results 11 to 20 of about 689,866 (345)
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. I describe how various properties of QCD at temperatures of a few hundred MeV play an important role in the theoretical computations that are needed
M. Laine
core +8 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. This hidden hot dark matter may reheat to a lower temperature and number density than the visible Universe ...
Kris Sigurdson
core +7 more sources
Improved Hot Dark Matter Bound on the QCD Axion. [PDF]
Physical Review Letters, 2022 We obtain a reliable cosmological bound on the axion mass m_{a} by (1) deriving the production rate directly from pion-pion scattering data, which overcomes the breakdown of chiral perturbation theory and results in ∼30% differences from previous ...
A. Notari +2 more
semanticscholar +4 more sources
Cosmic strings with self-interacting hot dark matter [PDF]
Monthly Notices of the Royal Astronomical Society, 1998 5 pages, 3ps figures, Latex, uses mn.sty, submitted to ...
P. P. Avelino, J. P. M. de Carvalho
openalex +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
Gravity as a portal to reheating, leptogenesis and dark matter [PDF]
Journal of High Energy Physics, 2022 We show that a minimal scenario, utilizing only the graviton as an intermediate messenger between the inflaton, the dark sector and the Standard Model (SM), is able to generate simultaneously the observed relic density of dark matter (DM), the baryon ...
Basabendu Barman +4 more
doaj +2 more sources
Warm-plus-hot neutrino dark matter [PDF]
Physical Review D, 1995 We investigate a new hybrid-model universe containing two types of dark matter, one ``warm'' and the other ``hot.'' The hot component is an ordinary light neutrino with mass \ensuremath{\sim}25${\mathit{h}}^{2}$ eV while the warm component is a sterile neutrino with mass \ensuremath{\sim}700${\mathit{h}}^{2}$ eV.
Robert Malaney +2 more
openalex +4 more sources
Hot leptogenesis from thermal Dark Matter [PDF]
Journal of Cosmology and Astroparticle Physics, 2017 In this work, we investigate a scenario in which heavy Majorana Right-Handed Neutrinos (RHNs) are in thermal equilibrium with a dark sector with temperature higher than the Standard Model (SM) thermal bath. Specifically, we consider the scenario in which
N. Bernal, C. S. Fong
semanticscholar +6 more sources
Interpreting Mass and Radius Measurements of Neutron Stars with Dark Matter Halos [PDF]
The Astrophysical JournalThe high densities of neutron stars (NSs) could provide astrophysical locations for dark matter (DM) to accumulate. Depending on the DM model, these DM admixed NSs (DANSs) could have significantly different properties than pure baryonic NSs, accessible ...
Shafayat Shawqi, Sharon M. Morsink
doaj +2 more sources