A hypothetical particle postulated become the quantum of gravitational connection and presumed to possess an indefinitely long life time, zero electric charge, and zero rest mass. See dining table at subatomic particle.
A hypothetical gauge boson that regulates the gravitational power. It would have a spin of 2 and zero sleep mass.
A theoretical measure boson that mediates the (incredibly weak) gravitational communications between particles; the quantum of the gravitational area, having zero remainder size and a spin of 2.
a gauge boson that mediates the (exceptionally poor) gravitational communications between particles