Results 21 to 30 of about 28,541 (177)
A model for mixed warm and hot right-handed neutrino dark matter
Journal of High Energy Physics, 2021 We discuss a model where a mixed warm and hot keV neutrino dark matter rises naturally. We arrange active and sterile neutrinos in the same SU(3) L multiplet, with the lightest sterile neutrino being dark matter.
Maíra Dutra +3 more
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Thermal production of cold “hot dark matter” around eV
Journal of High Energy Physics, 2023 A very simple production mechanism of feebly interacting dark matter (DM) that rarely annihilates is thermal production, which predicts the DM mass around eV. This has been widely known as the hot DM scenario.
Wen Yin
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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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Massive Dark Photons as Hot Dark Matter
Acta Physica Polonica B, 2022 Motivated by the growing interest in the existence of new massive gauge bosons, we suggest that massive dark photons A0 can be a consequence of a broken new abelian symmetry U(1)'X. Such a dark symmetry U(1)'D is afterwards supposed to be associated with the conservation of the weak number W belonging to the Weakling Interacting Slim Particles U(1)'W ...
openaire +2 more sources
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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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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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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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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Expanding Culturomics from Gut to Extreme Environmental Settings
mSystems, 2021 With the advent of metagenomics, a quest began to identify the dynamics of the microbial communities in different ecological niches. Altogether, this has resulted in identification of microorganisms but is limited to only a small number of phylogenetic ...
Utkarsh Sood, Roshan Kumar, Princy Hira
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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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