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In supersymmetry theories of particle physics, a gaugino is the hypothetical fermionic supersymmetric field quanta (superpartner) of a gauge field, as predicted by gauge theory combined with supersymmetry.

In the minimal supersymmetric extension of the standard model the following gauginos exist:

  • The gluino (symbol

    ) is the superpartner of the gluon, and hence carries color charge.
  • The gravitino (symbol

    ) is the supersymmetric partner of the graviton.
  • The winos (symbol
    and W͂3) are the superpartners of the W bosons of the SU(2)L gauge fields.
  • The bino is the superpartner of the U(1) gauge field corresponding to weak hypercharge.


Gauginos mix[clarification needed] with higgsinos, the superpartners of the Higgs field's degrees of freedom, to form mass eigenstates called neutralinos, which are electrically neutral, and charginos, which are electrically charged.

In many supersymmetric models[clarification needed], the lightest supersymmetric particle (LSP), often a neutralino such as the photino, is stable. In that case it is a WIMP and a candidate for dark matter.[further explanation needed]