# Chargino

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$\tilde \chi$±
1
(the lightest) and C$\tilde \chi$±
2
(the heaviest) although sometimes $\tilde{\chi}_1^\pm$ and $\tilde{\chi}_2^\pm$ is also used to refer to charginos, when $\tilde{\chi}_i^0$ 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:

C$\tilde \chi$±
2
C$\tilde \chi$±
1
+ Z0
C$\tilde \chi$±
2
0
2
+ W±
C$\tilde \chi$±
1
0
1
+ W±