Higgsino

In particle physics, for models with N = 1 supersymmetry, a higgsino, symbol H͂, is the superpartner of the Higgs field.

A higgsino is a Dirac fermionic field with spin ⁠1/2⁠ and it refers to a weak isodoublet with hypercharge half under the Standard Model gauge symmetries.

After electroweak symmetry breaking higgsino fields linearly mix with U(1) and SU(2) gauginos leading to four neutralinos and two charginos[1] that refer to physical particles.

A neutralino LSP, depending on its composition can be bino, wino or higgsino dominated in nature[2] and can have different zones of mass values in order to satisfy the estimated dark matter relic density.

Higgsino searches have been performed by both the ATLAS and CMS experiments at the Large Hadron Collider at CERN, where physicists have searched for the direct electroweak pair production of Higgsinos.