Higgsinos

Part of speech: noun

Definitions

  1. Elementary particles hypothesized in particle physics as fermionic partners of the Higgs boson within supersymmetric theories ; entities predicted by theoretical models extending the Standard Model to explain fundamental forces and particles ; hypothetical components in supersymmetry that mix to form neutralinos and charginos, crucial for understanding dark matter
  2. Particles proposed in supersymmetry representing the fermionic counterparts to scalar Higgs fields, playing a role in unifying forces ; theorized subatomic particles acting as superpartners to Higgs bosons, influencing mass generation mechanisms ; fundamental elements in theoretical frameworks investigating physics beyond the Standard Model, significant for dark matter research
  3. Theoretical fermions associated with the Higgs field in supersymmetric extensions, potentially observable in particle accelerators ; supersymmetric particles related to the Higgs boson’s properties and interactions, essential to particle mass theories ; components in advanced models explaining the universe’s composition, particularly in the context of dark matter candidates

Etymology: Higgsino is named after Peter Higgs, the Scottish physicist who in 1964 proposed the mechanism, now bearing his name, by which particles acquire mass. The "-ino" ending is a diminutive borrowed from Italian, used in physics to mark a particle as a lighter or smaller counterpart of another, as in the neutrino, "little neutral one," coined by Enrico Fermi in 1933. Physicists in the 1980s applied the same pattern to supersymmetry, the theory that pairs every known particle with a heavier partner differing by half a unit of spin. The higgsino is the partner of the Higgs boson, and since the Higgs boson has spin zero, its partner must be a fermion with spin one-half. The word is therefore a compound of a personal name and a diminutive suffix, coined as a plain technical label. Its physical reality remains unconfirmed, since no supersymmetric partner has yet been observed at the Large Hadron Collider.