Circa 1991
Question: How to prove the existence of graviton, boson?
What is the smallest particle found?
How come a particle has no charge, no mass and no existence?
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Gravitons are still theoretical.
The smallest particle with non-zero rest mass is still the electron.
The neutrino is a particle with zero rest mass (maybe) and no charge:
it carries only spin and momentum.
John Hawley
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