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 (the lightest) and  (the heaviest), although sometimes $$\tilde{\chi}_1^\pm$$ and $$\tilde{\chi}_2^\pm$$ are 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:


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