A Simultaneous Solution to Baryogenesis and Dark Matter Problems

Abstract

A new concept of generation of the cosmological baryon excess along with the cold dark matter (CDM) in the Universe is proposed and corresponding scenarios are outlined. Possible realizations of the idea in the framework of supersymmetric models are considered and constraints (predictions) on masses of sparticles compatible with the viability of the scenario are derived. Mulitiple predictions might be extracted from the concept. In particular, we predict a quite natural existence of a charge asymmetric component of CDM. A $\sim 10^{-2}$ part of CDM might exist in the form of electrically charged relic particles with masses $m\simeq 1$ TeV. They are negatively charged and are dresses by protons. This conjecture provides a rich field of immediate search for these particles. The charge symmetric component of CDM might be represented by very light, $m\approx 2$ GeV, very weakly interacting particles like right-handed sneutrinos ( so recoils expected are rare and have quite small energies, $E_{recoil}\sim 1$ KeV.) This leads by the way to prediction of long-living (charged) sparticles. Some new experimental proposals for non-traditional search of cold dark matter particles are mentioned.

Latex file. Talk at Workshop on 'Aspects of Dark Matter in Astro- and Particle Physics', Heidelberg, Germany, September 16-20, 1996; to be published in Proc. of Workshop by World-Scientific, Singapore, 1997

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