Graviton

Acurveinspacepredicted bygeneral relativity

Agravitonis ahypotheticalparticlethat 'transfers' gravitation's force (particles like this are known asgauge bosons) from itsfield.Gravitons have never been observed, directly or indirectly,however, there have been several theories that use gravitons to explain certain phenomena. For example, a theory that describesblack holesby combiningquantum mechanicsandgravity,has been advanced by Georgi Dvali and Cesar Gomez, which suggests a black hole is "an overpacked bucket of gravitons". There are some theories that suggest that gravitons would make up a new group of particles, "attraction particles". CERN is currently using the Large Hadron Collider to try to find this particle.

The graviton applies a tiny force as it impacts the nuclei of atoms. All atoms themselves have these graviton particles in orbit around them. If you gather a lot of atoms together the population of orbiting gravitons increases proportionately. As a result, a large asteroid for example will have more gravity than a small one. Because the graviton is a particle that hasforce(gravity), it is classed as agauge boson.Other gauge bosons include thephoton,thegluon,and theW and Z particles.

If someone found one, it could lead to a theory which would join the four main physical forces:electromagnetism,gravity,strong forceandweak force.