A superfield is a function on superspace. Its finite Taylor expansion in Grassmann coordinates packages component fields into a supersymmetry representation.
An auxiliary field has no kinetic term and can be eliminated algebraically. The complex field in a chiral superfield balances bosonic and fermionic degrees of freedom off shell.
The supersymmetric non-renormalization theorem says that the Wilsonian superpotential receives no perturbative corrections. Holomorphy and spurion symmetries can often exclude nonperturbative corrections as well.
The Kähler potential is a real function integrated over full superspace. The canonical choice gives canonical kinetic terms.
The Wess–Zumino model contains chiral superfields with a polynomial superpotential. It is the simplest interacting four-dimensional supersymmetric field theory.
Supersymmetry fixes scalar and fermion couplings so that bosonic and fermionic loop contributions to scalar masses have equal quadratic ultraviolet parts with opposite signs.
Soft supersymmetry breaking adds operators of positive mass dimension that break supersymmetry without reintroducing new ultraviolet quadratic divergences.
The Polonyi model uses a canonical Kähler potential and a superpotential linear in one chiral superfield to obtain spontaneous supersymmetry breaking.
A spurion is a nondynamical background field assigned transformation properties so that couplings or symmetry-breaking parameters can be treated as if they arose from symmetry-covariant fields.
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Supersymmetry (often abbreviated as SUSY) is a theoretical framework in particle physics that posits a relationship between two fundamental classes of particles: bosons and fermions. In the standard model of particle physics, bosons are force-carrying particles (e.g., photons, W and Z bosons, and gluons) that have integer spin, while fermions are matter particles (e.g., quarks and leptons) that have half-integer spin.