6533b85afe1ef96bd12b8c7a
RESEARCH PRODUCT
Super Heavy Dark Matter Anisotropies from D-particles in the Early Universe
Joannis PapavassiliouNick E. MavromatosNick E. Mavromatossubject
PhysicsHigh Energy Physics - TheoryNuclear and High Energy PhysicsDe Sitter spaceSpace timeDark matterAstrophysics (astro-ph)FísicaFOS: Physical sciencesAstronomy and AstrophysicsGeneral Relativity and Quantum Cosmology (gr-qc)String theoryAstrophysicsAtomic and Molecular Physics and OpticsGraceful exitWKB approximationGeneral Relativity and Quantum CosmologyHigh Energy Physics - Theory (hep-th)Quantum electrodynamicsEffective field theoryFlatness (cosmology)description
We discuss a way of producing anisotropies in the spectrum of superheavy Dark matter, which are due to the distortion of the inflationary space time induced by the recoil of D-particles upon their scattering with ordinary string matter in the Early Universe. We calculate such distortions by world-sheet Liouville string theory (perturbative) methods. The resulting anisotropies are found to be proportional to the average recoil velocity and density of the D-particles. In our analysis we employ a regulated version of de Sitter space, allowing for graceful exit from inflation. This guarantees the asymptotic flatness of the space time, as required for a consistent interpretation, within an effective field theory context, of the associated Bogolubov coefficients as particle number densities. The latter are computed by standard WKB methods.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2004-01-01 |