Lorentz-Symmetry Breaking and Supersymmetry

We discuss three manners to implement Lorentz-symmetry breaking in a superfield theory formulated within the superfield formalism, that is, deformation of the supersymmetry algebra, introducing an extra superfield whose components can depend on Lorentz-violating vectors (tensors), and adding new terms proportional to Lorentz-violating vectors (tensors) to the superfield action. We illustrate these methodologies with examples of quantum calculations.