Results 231 to 240 of about 53,858 (261)

Screened axio-dilaton cosmology: novel forms of early dark energy. [PDF]

open access: yesEur Phys J C Part Fields
Smith A   +4 more
europepmc   +1 more source

Cold Dark Matter

Science, 1996
Motivated by inflation, the theory of big-bang nucleosynthesis, and the quest for a deeper understanding of fundamental forces and particles, a paradigm for the development of structure in the universe has evolved. It holds that most of the matter exists in the form of slowly moving elementary particles left over from the earliest moments ...
Scott Dodelson   +2 more
openaire   +1 more source

Dark neutrinos as Cold Dark Matter

Astroparticle Physics, 2015
Abstract It is shown that heavy sterile neutrinos can be a consequence of a new broken U(1)X symmetry. This sterile symmetry is further speculated to be related to the conservation of the dark number associated with Dark Matter particles, corresponding to a dark neutrino mass m N D ⩾ 1 keV with a high scale ⩾ ∼ 10
R. Ahl Laamara   +2 more
openaire   +1 more source

How Cold Is Cold Dark Matter?

Science, 2008
Identification of the particles that constitute dark matter would revolutionize particle physics and the astrophysics of galaxy formation.
openaire   +1 more source

Cold dark matter

1999
Abstract The processes by which stars and planetary systems form from interstellar gas clouds, and by which galaxies form from protogalactic gas clouds, are among the most intractable in modern physics. We know a great deal about general relativity, black holes, particle physics, the evolution of the universe.
openaire   +1 more source

Model for cold dark matter

Zeitschrift f�r Physik A Hadrons and Nuclei, 1992
We present a model for cold dark matter based upon continuum bound states of thee + e − system. These continuum bound states, referred to as photonium states to distinguish them from the well-known bound states of positronium, are shown to have cross sections and lifetime properties consistent with abundant production in the early universe and survival
D. K. Ross, J. R. Spence, J. P. Vary
openaire   +1 more source

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