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In particle physics, a Higgsino is the hypothetical superpartner of the Higgs boson, as predicted by supersymmetry. The Higgsino is a Dirac fermion and that is a weak isodoublet with hypercharge half under the Standard Model gauge symmetries. After electroweak symmetry breaking the Higgsino becomes a pair of neutral Majorana fermions called neutralinos and a charged Dirac fermion called a chargino. These states mix with the neutralinos and charginos from the bino and wino. A linear combination of the Higgsino, bino and wino make up the lightest supersymmetric particle, which is a particle physics candidate for the dark matter of the universe. In order to be such a candidate, it must be neutral (i.e. a neutralino rather than chargino).

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Higgsino". A list of authors is available in Wikipedia.
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