Simultaneous solution to baryogenesis and dark-matter problems

A new concept of the generation of a cosmological baryon excess along with cold dark matter (CDM) in the Universe is proposed, and the corresponding scenarios are outlined. Possible realizations of the idea on the basis of supersymmetric models are considered, and constraints (predictions) on sparticle masses compatible with the viability of the scenario are derived. Numerous predictions might be extracted from the concept. In particular, the natural existence of a charge-asymmetric component of CDM is predicted. In particular, a 10(-2) part of CDM might exist in the form of electrically charged relic particles with masses m similar or equal to 1 TeV. They are negatively charged and are dressed by protons. This conjecture provokes a rich field of immediate searches for these particles. The charge-symmetric component of CDM might be represented by very light, m approximate to 2 GeV, very weakly interacting particles like right-handed sneutrinos, so that recoils are expected to be rare and to have quite low energies, E-recoil similar to 1 keV. Among other things, this leads to predicting long-lived sparticles. Some new experimental proposals for nontraditional searches for CDM particles are mentioned.