5 Things Dark Matter Might Be, According to Scientists: Galaxies

Gravitino

The gravitino is a theoretical particle that’s supposed to be the partner of another theoretical partner, which, in the grand scheme of things, makes it super-duper theoretical. This particle is predicted by theories that combine general relativity with a principle called supersymmetry, which is a scientifically popular idea that essentially makes the equations for force and the equations for matter identical.

Supersymmetry says that all boson particles like photons (the particle for light) and gravitons (the theoretical particle for gravity) have a “superpartner” — in this example, the photino and the gravitino — that differs from that particle in a predictable way. In some models, this gravitino could account for dark matter.

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