Results 21 to 30 of about 33,160 (253)
Shining light on the scotogenic model: interplay of colliders and cosmology
Journal of High Energy Physics, 2020 In the framework of the scotogenic model, which features radiative generation of neutrino masses, we explore light dark matter scenario. Throughout the paper we chiefly focus on keV-scale dark matter which can be produced either via freeze-in through the
Sven Baumholzer +3 more
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Hot and heavy dark matter from a weak scale phase transition
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
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Astronomy, 2023 We reconstructed dark spots in the images of supermassive black holes SgrA* and M87* provided by the Event Horizon Telescope (EHT) collaboration by using the geometrically thin accretion disk model. In this model, the black hole is highlighted by the hot
Vyacheslav Ivanovich Dokuchaev
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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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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
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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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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
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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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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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Cosmological axion and neutrino mass constraints from Planck 2015 temperature and polarization data
Physics Letters B, 2016 Axions currently provide the most compelling solution to the strong CP problem. These particles may be copiously produced in the early universe, including via thermal processes.
Eleonora Di Valentino +5 more
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