FIGURE 4. Examples of supersymmetric partners.
From the following article:
Beyond the standard model with the LHC
John Ellis
Nature 448, 297-301(19 July 2007)
doi:10.1038/nature06079
Supersymmetry is a symmetry drawn between fermions (with half-integer spin) and bosons (with integer spin). It postulates that, for each fermion, there exists a bosonic partner — such as the supersymmetric electron, or 'selectron', which partners the electron. Similarly, each boson is thought to have a fermionic superpartner, which for the gluon is the 'gluino'.
