In particle physics, supersymmetry (often abbreviated SUSY) is a symmetry that interchanges bosons and fermions. In supersymmetric theories, every fundamental fermion has a bosonic superpartner and vice versa. A supersymmetric quantum field theory tames quantum mechanical dynamics and sometimes allows the theory to be solved. If supersymmetry is applied to the Standard Model of particle physics, the hierarchy problem can be solved. The minimal supersymmetric Standard Model is one of the best studied candidates for physics beyond the Standard Model.