Supersymmetric quantum field theory

theory of strings with supersymmetry

In particle physics, a superpartner (also sparticle) is a class of hypothetical elementary particles predicted by supersymmetry, which, among other applications, is one of the well-studied ways to extend the Standard Model of high-energy physics.

In supersymmetry, the neutralino is a hypothetical particle. In the Minimal Supersymmetric Standard Model (MSSM), a popular model of realization of supersymmetry at a low energy, there are four neutralinos that are fermions and are electrically neutral, the lightest of which is stable in an R-parity conserved scenario of MSSM. They are typically labeled (the lightest), , and (the heaviest) although sometimes \tilde{\chi}_1^0, \ldots, \tilde{\chi}_4^0 is also used when \tilde{\chi}_i^\pm is used to refer to charginos.

In supersymmetry theories of particle physics, a gaugino is the hypothetical fermionic supersymmetric field quantum (superpartner) of a gauge field, as predicted by gauge theory combined with supersymmetry. All gauginos have a spin of , except for the gravitino, which has a spin of .

In particle physics, the chargino is a hypothetical particle which refers to the mass eigenstates of a charged superpartner, i.e. any new electrically charged fermion (with spin 1/2) predicted by supersymmetry. They are linear combinations of the charged wino and charged higgsinos. There are two charginos that are fermions and are electrically charged, which are typically labeled (the lightest) and (the heaviest), although sometimes \tilde{\chi}_1^\pm and \tilde{\chi}_2^\pm are also used to refer to charginos, when \tilde{\chi}_i^0 is used to refer to neutralinos. The heavier chargino can deca

The axino is a hypothetical elementary particle predicted by some theories of particle physics. Peccei–Quinn theory attempts to explain the observed phenomenon known as the strong CP problem by introducing a hypothetical real scalar particle called the axion. Adding supersymmetry to the model predicts the existence of a fermionic superpartner for the axion, the axino, and a bosonic superpartner, the saxion. They are all bundled up in a chiral superfield.

In supersymmetric extension to the Standard Model (SM) of physics, a sfermion is a hypothetical spin-0 superpartner particle (sparticle) of its associated fermion. Each particle has a superpartner with spin that differs by . Fermions in the SM have spin- and, therefore, sfermions have spin 0.

In particle physics, for models with N = 1 supersymmetry, a higgsino, symbol , is the superpartner of the Higgs field. A higgsino is a Dirac fermionic field with spin 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 that refer to physical particles. While the two charginos are charged Dirac fermions (plus and minus each), the neutralinos are electrically neutral Majorana fermions. In an R-parity-conserving

four-dimensional superconformal gauge theory with 16 supercharges

supersymmetric extension to the Standard Model

generic name given to the lightest of the additional hypothetical particles found in supersymmetric models

grand unified model based on the gauge group SU(5), ruled out by limits on proton decay

R-parity is a concept in particle physics. In the Minimal Supersymmetric Standard Model, baryon number and lepton number are no longer conserved by all of the renormalizable couplings in the theory. Since baryon number and lepton number conservation have been tested very precisely, these couplings need to be very small in order not to be in conflict with experimental data. R-parity is a \mathbb{Z}_2 symmetry acting on the Minimal Supersymmetric Standard Model (MSSM) fields that forbids these couplings and can be defined as P_\mathrm{R} = (-1)^{3B+L+2s}

phenomenon in which a hypothesized supersymmetry at high energy scales is spontaneously broken at low energy scales

quantum field theory involving both gauge symmetry and supersymmetry

The goldstino is the Nambu–Goldstone fermion emerging in the spontaneous breaking of supersymmetry. It is the close fermionic analog of the Nambu–Goldstone bosons controlling the spontaneous breakdown of ordinary bosonic symmetries.

type of supersymmetric quantum field theory

analytic solution for N=2 supersymmetric gauge theories

quantum field theory