Antimatter in the Modern Universe

It was shown in [85], [276], [83] and discussed in the previous chapter that the existence of antimatter domains in the baryon-dominated Universe is a profound signature for the origin and evolution of primordial baryon matter inhomogeneity. Depending on its parameters the mechanism of inhomogeneons baryosynthesis can lead to both high and low antibaryon density domains. According to [85] high density domains can evolve into antimatter stellar objects so that a globular cluster of antimatter stars can exist in our Galaxy, that may be tested in the cosmic searches for antimatter planned for the near future. Such searches involve both direct search for pieces of antimatter — for antinuclei or antimeteorites, or use indirect probes by gamma radiation that may be originated from antimatter annihilation.