Chargino
![](/Images/godic/202501/04/CERN_LHC_Tunnel10619.jpg")
In particle physics, the chargino is a hypothetical particle which refers to the mass eigenstates of a charged superpartner, i.e. any new electrically charged fermion (with spin 1/2) predicted by supersymmetry. They are linear combinations of the charged wino and charged higgsinos. There are two charginos that are fermions and are electrically charged, which are typically labeled C![\tilde \chi](/Images/godic/202501/04/6131a1447e20f8c7ad13a82076bb525b0619.png")
±
1 (the lightest) and C±
2 (the heaviest) although sometimes ![\tilde{\chi}_1^\pm](/Images/godic/202501/04/c103361799af9e5262babf73edd7e4940619.png")
and ![\tilde{\chi}_2^\pm](/Images/godic/202501/04/6915f0331b2f0a3030e55279e48284380620.png")
is also used to refer to charginos, when ![\tilde{\chi}_i^0](/Images/godic/202501/04/33d1b88118186a99eb80f43f1faeecc50620.png")
is used to refer to neutralinos. The heavier chargino can decay through the neutral Z boson to the lighter chargino. Both can decay through a charged W boson to a neutralino: