In supersymmetry theories of particle physics , a gaugino / ɡ eɪ ˈ dʒ iː n oʊ / is the hypothetical fermionic supersymmetric field quantum ( superpartner ) of a gauge field , as predicted by gauge theory combined with supersymmetry . All gauginos have a spin of 1 ⁄ 2 , except for the gravitino , which has a spin of 3 ⁄ 2 . In the minimal supersymmetric extension of the Standard Model the following gauginos exist: The gluino (symbol g ͂ ) is the superpartner of the gluon , and hence carries color charge . The gravitino (symbol G ͂ ) is the supersymmetric partner of the graviton . Three winos (symbol W ͂ ± and W͂ 3 ) 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 correspondin...