Super Heavy Dark Matter Anisotropies from D-particles in the Early Universe

Details Super Heavy Dark Matter Anisotropies from D-particles in the Early Universe Super Heavy Dark Matter Anisotropies from D-particles in the Early Universe

2003-07-02

arxiv.org/abs/hep-th/0307028v1

Int.J.Mod.Phys. A19 (2004) 2355

Physics

High Energy Physics

High Energy Physics - Theory

30 pages Latex, two eps figures incorporated

Scientific paper

10.1142/S0217751X04018397

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.

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