Do particles and anti-particles really annihilate each other?
Do particles and anti-particles really annihilate each other?
In this talk I present theoretical evidence, based onÌýnon-perturbative semi-classical quantization techniques, Ìýthat whatÌýappears as the annihilation of PositroniumÌý(Ps)Ìýmay in reality beÌýjust another electromagneticÌýtransition from the hydrogenicÌýpseudo-ground state of Ps toÌýa true quantum-mechanical ground state nearÌýzeroÌýenergy,ÌýÌýcaused by theÌýmagneticÌýinteractions of the particles. This ground state cannot be found byÌýperturbingÌýaround the hydrogenic pseudo-groundÌýstate usingÌýtheÌýusual Feynman diagram techniques. Once in this tightly bound near-0 energyÌýground state, PsÌýwould behave effectively like an ultralight neutralÌýspin-0 boson --- the very type of particle currently thought to beÌýthe mostÌýlikely explanation for the mysterious dark matter in the universe.