Results 11 to 20 of about 32,079 (250)
Indirect detection of hot dark matter
Journal of High Energy PhysicsCosmologically 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 +3 more
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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 perturbations can survive. Smaller scale perturbations are damped due to neutrino diffusion.
Atrio-Barandela, Fernando +1 more
openaire +2 more sources
Axions as hot and cold dark matter [PDF]
Journal of Cosmology and Astroparticle Physics, 2014 The presence of a hot dark matter component has been hinted at 3 sigma by a combination of the results from different cosmological observations. We examine a possibility that pseudo Nambu-Goldstone bosons account for both hot and cold dark matter components.
Jeong, Kwang Sik +2 more
openaire +4 more sources
Improved Hot Dark Matter Bound on the QCD Axion
Physical Review Letters, 2023 6+8 pages, 7 ...
Alessio Notari +2 more
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Majorana neutrinos as the dark matters in the cold plus hot dark matter model [PDF]
Physics Letters B, 1996 A simple model of the Majorana neutrino with the see-saw mechanism is studied, assuming that two light neutrinos are the hot dark matters with equal mass of 2.4 eV in the cold plus hot dark matter model of cosmology. We find that the heavy neutrino, which is the see-saw partner with the remaining one light neutrino, can be the cold dark matter, if the ...
Kitazawa, Noriaki +2 more
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Forbidden frozen-in dark matter
Journal of High Energy Physics, 2019 We examine and point out the importance of a regime of dark matter pro- duction through the freeze-in mechanism that results from a large thermal correction to a decaying mediator particle mass from hot plasma in the early Universe. We show that mediator
L. Darmé +3 more
doaj +1 more source
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.
, Malaney, , Starkman, , Widrow
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Light Dark Matter from Entropy Dilution
Journal of High Energy Physics, 2020 We show that a thermal relic which decouples from the standard model (SM) plasma while relativistic can be a viable dark matter (DM) candidate, if the decoupling is followed by a period of entropy dilution that heats up the SM, but not the dark sector ...
Jared A. Evans +4 more
doaj +1 more source
Hot Dark Matter in Cosmology [PDF]
, 2001 22 pages, including four postscript figures; to appear in D. O.
Primack, Joel R., Gross, Michael A. K.
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European Physical Journal C: Particles and Fields, 2023 A view is taken up whereby the non-singular Trautman–Kopczyński big-bang creation of the Universe produced a highly torsional hot state at early stages of the cosmic evolution which particularly brought about the formation of a dark matter cloud.
J. G. Cardoso
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