gravitino
/ˌɡravɪˈtiːnəʊ/Particle Physics
noun
1A hypothetical particle of zero rest mass and negative energy, postulated in a theory of the continuous creation of matter. Now historical.
2A hypothetical particle which is the supersymmetric counterpart of a graviton, with spin 3/2 instead of 2.
- Whether or not the gravitino has mass depends on whether (in the theories) supersymmetry is unbroken (the gravitino has no mass) or broken (it does have mass)..
Origin
1950s. From gravit- + -ino.
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