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Higgsino

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).

v • d • e Particles in physics
Elementary particles	Fermions: Quarks: u · d · s · c · b · t • Leptons: e^- · e⁺ · μ^- · μ⁺ · τ^- · τ⁺ · ν_e · ν_μ · ν_τ Bosons: Gauge bosons: γ · g · W^± · Z⁰ Other: Ghosts
Composite particles	Hadrons: Baryons(list)/Hyperons/Nucleons: p · n · Δ · Λ · Σ · Ξ · Ω · Ξ_b • Mesons(list)/Quarkonia: π · K · ρ · J/ψ · Υ Other: Atomic nuclei • Atoms • Exotic atoms: Positronium • Molecules
Hypothetical elementary particles	Superpartners: Axino · Dilatino · Chargino · Gluino · Gravitino · Higgsino · Neutralino · Sfermion · Slepton · Squark Other: Axion · Dilaton · Goldstone boson · Graviton · Higgs boson · Tachyon · X · Y · W' · Z'
	Exotic hadrons: Exotic baryons: Pentaquark • Exotic mesons: Glueball · Tetraquark Other: Mesonic molecule
Quasiparticles	Davydov soliton · Exciton · Magnon · Phonon · Plasmon · Polariton · Polaron