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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][2] 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[math]\displaystyle{ \tilde \chi }[/math]±1 (the lightest) and C[math]\displaystyle{ \tilde \chi }[/math]±2 (the heaviest), although sometimes [math]\displaystyle{ \tilde{\chi}_1^\pm }[/math] and [math]\displaystyle{ \tilde{\chi}_2^\pm }[/math] are also used to refer to charginos, when [math]\displaystyle{ \tilde{\chi}_i^0 }[/math] 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[math]\displaystyle{ \tilde \chi }[/math]±2C[math]\displaystyle{ \tilde \chi }[/math]±1 + Z0
C[math]\displaystyle{ \tilde \chi }[/math]±202 + W±
C[math]\displaystyle{ \tilde \chi }[/math]±101 + W±

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