Results 61 to 70 of about 701,414 (343)
Sterile neutrino hot, warm, and cold dark matter [PDF]
Physical Review D, 2001 We calculate the incoherent resonant and non-resonant scattering production of sterile neutrinos in the early universe. We find ranges of sterile neutrino masses, vacuum mixing angles, and initial lepton numbers which allow these species to constitute viable hot, warm, and cold dark matter (HDM, WDM, CDM) candidates which meet observational constraints.
Abazajian, Kevork +2 more
openaire +4 more sources
Sterile neutrino dark matter in left-right theories
Journal of High Energy Physics, 2020 SU(2) L × SU(2) R gauge symmetry requires three right-handed neutrinos (N i ), one of which, N 1, can be sufficiently stable to be dark matter. In the early universe, W R exchange with the Standard Model thermal bath keeps the right-handed neutrinos in ...
Jeff A. Dror +3 more
doaj +1 more source
Axionic hot dark matter in the hadronic axion window [PDF]
Physics Letters B, 1998 Mixed dark matter scenario can reconcile the COBE data and the observed large scale structure. So far the massive neutrino with a mass of a few eV has been the only discussed candidate for the hot dark matter component. We point out that the hadronic axion in the so-called hadronic axion window, f_a \sim 10^6 GeV, is a perfect candidate as hot dark ...
Takeo Moroi, Hitoshi Murayama
openalex +6 more sources
Cosmological Effects of Quantum Vacuum Condensates
Galaxies, 2017 In quantum field theory, many phenomena are characterized by a condensed structure of their vacua. Such a structure is responsible of a non trivial vacuum energy. Here we analyze disparate systems and we show that the thermal vacuum state for hot plasmas,
Antonio Capolupo
doaj +1 more source
The Sun as a sub-GeV Dark Matter Accelerator [PDF]
, 2018 Sub-GeV halo dark matter that enters the Sun can potentially scatter off hot solar nuclei and be ejected much faster than its incoming velocity. We derive an expression for the rate and velocity distribution of these reflected particles taking into ...
Emken, Timon +2 more
core +3 more sources
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
openaire +2 more sources
Angular momentum distribution of hot gas and implications for disk galaxy formation
, 2003 We study the angular momentum profiles both for dark matter and for gas within virialized halos, using a statistical sample of halos drawn from cosmological hydrodynamics simulations.
Avila-Reese V. +8 more
core +1 more source
Constraints on interacting dark energy models through cosmic chronometers and Gaussian process
, 2020 Energy flows between dark energy and dark matter may alleviate the Hubble tension and mitigate the coincidence problem. In this paper, after reconstructing the redshift evolution of the Hubble function by adopting Gaussian process techniques, we estimate
Aljaf, Muhsin +2 more
core +1 more source
Search for Neutrino Mass and Dark Matter in Underground Experiments [PDF]
, 2002 Search for the neutrino mass and for cold dark matter in the Universe are at present two of the most exciting fields of particle physics and cosmology.
Klapdor-Kleingrothaus, H. V.
core +2 more sources
Warm and fuzzy dark matter: Free streaming of wave dark matter [PDF]
Physical Review DWave or fuzzy dark matter that is produced with relativistic wave numbers exhibits free-streaming effects analogous to warm or hot particle dark matter with relativistic momenta.
Rayne Liu, Wayne Hu, Huangyu Xiao
semanticscholar +1 more source