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Why we may already have observed dark matter particles

2023, Reviewing our understanding of antimatter and dark matter

Dirac concepts of anitmatter and electron seas are reviewed, as well as the first observations confirming the existence of antimatter. More recent observations of antimatter in protons are described. It is realistic to envisage thatf large amounts of antimatter are pesent in space, as well of exotic corpuscles containing antimatter, such as pions and positronium.. Different technologies using already antimatter are described, such as PET and PAT. New antimatter based technological alternatives are also proposed, including the production of a new source of clean energy, or thrust control. More theoretically, it is envisaged that large amounts of antimatter may be present in space and constitue the bulk of the still not identified dark matter.