= 1 Supersymmetric Yang - Mills Theories on the Lattice without Fine - Tuning

We propose a method to formulate four-dimensionalN = 1 super Yang-Mills theory on the lattice without fine-tuning. We first show that a Weyl fermion in a real representation can be formulated using the domain wall approach with an addition of a Majorana mass term only for the unwanted mirror fermion. This formalism has manifest gauge invariance. The fermion number conservation is only violated by the additional Majorana mass term for the mirror fermion and the violation is propagated to the physical fermion sector through anomalous currents. Due to this feature, the formalism, when applied to the gluino in the present case, ensures the restoration of supersymmetry in the continuum limit without fine-tuning, unlike the proposal by Curci and Veneziano.