gaugino

{{Short description|Hypothetical subatomic particle predicted by supersymmetry}}

{{more footnotes|date=March 2018}}

{{Standard model of particle physics}}

In supersymmetry theories of particle physics, a gaugino 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 {{SubatomicParticle|gluino}}) is the superpartner of the gluon, and hence carries color charge.
• The gravitino (symbol {{SubatomicParticle|gravitino}}) is the supersymmetric partner of the graviton.
• Three winos (symbol {{SubatomicParticle|Wino+-}} 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.

Sometimes the term "electroweakinos" is used to refer to winos and binos and on occasion also higgsinos.{{Cite journal | doi=10.1007/JHEP12(2014)108| arxiv=1410.6287| bibcode=2014JHEP...12..108G| title=Prospects for electroweakino discovery at a 100 TeV hadron collider| year=2014| last1=Gori| first1=Stefania| last2=Jung| first2=Sunghoon| last3=Wang| first3=Lian-Tao| last4=Wells| first4=James D.| journal=Journal of High Energy Physics| volume=2014| issue=12| pages=108| s2cid=118439454}} Note that in other SUSY models the zino ({{SubatomicParticle|Zino}}) is the superpartner of the Z boson.