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 C͂±1 (the lightest) and C͂±2 (the heaviest), although sometimes

χ

~

1

±

{\displaystyle {\tilde {\chi }}_{1}^{\pm }}

and

χ

~

2

±

{\displaystyle {\tilde {\chi }}_{2}^{\pm }}

are also used to refer to charginos, when

χ

~

i

0

{\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:

C͂±2 → C͂±1 + Z0

C͂±2 → N͂02 + W±

C͂±1 → N͂01 + W±

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