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Indirect detection of hot dark matter [PDF]
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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Hot new early dark energy: Towards a unified dark sector of neutrinos, dark energy and dark matter [PDF]
Physics Letters B, 2022 Hot new early dark energy describes a supercooled, first-order phase transition that takes place at sub-eV temperatures in the dark sector. It lowers the sound horizon, which provides a possible solution to the Hubble tension, and, at the same time, it ...
Florian Niedermann, Martin S. Sloth
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Thermal production of cold “hot dark matter” around eV [PDF]
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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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
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Improved Hot Dark Matter Bound on the QCD Axion [PDF]
Physical Review Letters, 2023 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 ...
Alessio Notari +2 more
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A model for mixed warm and hot right-handed neutrino dark matter [PDF]
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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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 +2 more
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Nonthermal hot dark matter from inflaton or moduli decay: Momentum distribution and relaxation of the cosmological mass bound [PDF]
Physical Review D, 2021 Decay of the inflaton or moduli which dominated the energy density of the universe at early times leads to a matter to radiation transition epoch. We consider non-thermal sterile dark matter particles produced as decay product during such transitions ...
Sukannya Bhattacharya +5 more
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Model of the Galaxy with Hot Dark Matter
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.
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CosmologicalN-body simulations with generic hot dark matter [PDF]
, 2017 We have calculated the non-linear effects of generic fermionic and bosonic hot dark matter components in cosmological N-body simulations. For sub-eV masses, the non-linear power spectrum suppression caused by thermal free-streaming resembles the one seen
Jacob Brandbyge, Steen Hannestad
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