A graviton is a hypothetical elementary particle that transmits the force of gravity.

The hypothetical elementary particles with this property are called tachyonic particles.

The axino is a hypothetical elementary particle predicted by some theories of particle physics.

In particle physics, a superpartner (also sparticle) is a hypothetical elementary particle.

The curvaton is a hypothetical elementary particle which mediates a scalar field in early universe cosmology.

The axion is a hypothetical elementary particle originally postulated to solve the strong CP problem.

These references rarely reflect the expected properties of the hypothetical elementary particle, or do so only vaguely, and often imbue it with fantastic properties.

In physics, the graviton is a hypothetical elementary particle that mediates the force of gravitation in the framework of quantum field theory.

Maximon - an hypothetical elementary particle of maximum mass in the mass spectrum of elementary particles having mass of 5 x 10 eV.

Additionally, the graviton (G), a hypothetical elementary particle not incorporated in the Standard Model, if it exists, must be a boson, and could conceivably be a gauge boson.

There may be hypothetical elementary particles not described by the Standard Model, such as the graviton, the particle that would carry the gravitational force, and sparticles, supersymmetric partners of the ordinary particles.

These hypothetical elementary particles could be Weakly Interacting Massive Particles, or WIMPs, weighing as little as a few protons or as much as several heavy nuclei.

Physicists smash particle beams together at the Large Hadron Collider (LHC), the world's largest and most powerful particle accelerator, but they've yet to find the so-far hypothetical elementary particle in the resulting subatomic debris.

In particle physics, the X and Y bosons (or sometimes collectively called just X bosons) are hypothetical elementary particles analogous to the W and Z bosons, but corresponding to a new type of force predicted by the Georgi-Glashow model, a grand unified theory.