Dilatonic dark matter and its experimental detection

Dilatonic Dark Matter ∗ – A New Paradigm –

We study the possibility that the dilaton plays the role of the dark matter of the universe. We find that the condition for the dilaton to be the dark matter of the universe strongly restricts its mass to be around 0.5 keV or 270 MeV. For the other mass ranges, the dilaton either undercloses or overcloses the universe. The 0.5 keV dilaton has the free-streaming distance of about 1.4 Mpc and bec...

Dark Matter: Its Nature

Experimental Searches for Non - Baryonic Dark Matter : WIMP Direct Detection

Experimental observations and robust theoretical arguments have established that our universe is essentially non-visible, the luminous matter scarcely accounting for one per cent of the energy density of a flat universe. The distribution of a flat universe (Ω = ΩM + ΩΛ = 1) attributes to the dark energy about ΩΛ ∼ 70%, whereas the matter density takes the remaining ΩM ∼ 30%, consisting of, both...

Dark Matter Detection in the Light of Recent Experimental Results

The existence of dark matter was suggested, using simple gravitational arguments, seventy years ago. Although we are now convinced that most of the mass in the Universe is indeed some non-luminous matter, we still do not know its composition. The problem of the dark matter in the Universe is reviewed here. Particle candidates for dark matter are discussed with particular emphasis on Weakly Inte...

experimental constraint on dark matter detection with optical atomic clocks

The total mass density of the Universe appears to be dominated by dark matter. However, beyond its gravitational interactions at the galactic scale, little is known about its nature1. Several proposals have been advanced in recent years for the detection of dark matter2–4. In particular, a network of atomic clocks could be used to search for transient indicators of hypothetical dark matter5 in ...