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The gravitino is the hypothetical supersymmetric partner of the graviton, as predicted by theories combining general relativity and supersymmetry, i.e. supergravity theories. If it exists it is a fermion of spin 3/2.
| Fermions : Quarks | Leptons | |
| Gauge Bosons : Photon | W+, W- and Z0 bosons | Gluons | |
| Not yet observed | |
| Higgs boson | Graviton | |
| Supersymmetric Partners : Neutralinos | Charginos | Gravitino | Gluinos | Squarks | Sleptons | |