The first theory of these particles explained them
The first theory of these particles explained them as the holes in the distribution of the sea of negative-energy particles predicted by the Dirac equation. In Feynman diagrams, these particles move backwards in time, while their relative rarity in the universe is thought to be related to CP symmetry violation. These particles were first observed in 1932 by Carl Anderson, while they can be captured in (*) Penning traps. Each one carrying the same mass and opposite charge as the particle with which it annihilates, for 10 points, name these subatomic particles, examples of which include the positron and antiproton.
The first theory of these particles explained them as the holes in the distribution of the sea of negative-energy particles predicted by the Dirac equation.
{antiparticles} [accept {antimatter}; accept {positron} before mentioned]