Primordial antimatter in the contemporary universe

Understand

In some baryogenesis scenarios, the universe acquires a non-vanishing average baryonic charge, but the baryon to photon ratio is not spatially constant and can be even negative in some space regions.

• This allows for existence of lumps of antimatter in our neighborhood and the possibility that very compact antimatter objects make a part of cosmological dark matter.
• Here I discuss the peculiar signatures which may be observed in a near future.