Definitions for Higgsino
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The superpartner of the Higgs boson.
In particle physics, a Higgsino, symbol H͂, 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 finally mix with the neutralinos and chargino to form the predicted particles which are four neutralinos and two charginos. Such a linear combination of the Higgsino, bino and wino makes 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.
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