# 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.[1] 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${\displaystyle {\tilde {\chi }}}$±
1
(the lightest) and
C${\displaystyle {\tilde {\chi }}}$±
2
(the heaviest) although sometimes ${\displaystyle {\tilde {\chi }}_{1}^{\pm }}$ and ${\displaystyle {\tilde {\chi }}_{2}^{\pm }}$ is also used to refer to charginos, when ${\displaystyle {\tilde {\chi }}_{i}^{0}}$ 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${\displaystyle {\tilde {\chi }}}$±
2

C${\displaystyle {\tilde {\chi }}}$±
1
+
Z0

C${\displaystyle {\tilde {\chi }}}$±
2

0
2
+
W±

C${\displaystyle {\tilde {\chi }}}$±
1

0
1
+
W±

## References

1. ^ M.Binder, U.Blumenschein, V.Buescher, M.Hohlfeld and A.Yurkewicz. "Search for Supersymmetry via Associated Production of Charginos and Neutralinos in Final States with Three Leptons". Fermi National Accelerator Laboratory. www-d0.fnal.gov. Retrieved 28 April 2016.CS1 maint: Multiple names: authors list (link)