Goldstino zero mode from vacuum stationarity
= Goldstino zero mode from vacuum stationarity
{title2=$W_{ij}\overline{W_j}=0$}
Stationarity of a canonical global <F-term scalar potential> gives $\partial_iV=\sum_jW_{ij}\overline{W_j}=0$. If some $F_j=-\overline{W_j}$ is nonzero, this vector is in the <kernel> of the <chiral-superfield fermion mass matrix>. It supplies the massless <goldstino> direction. If every $F_j$ vanishes, this argument gives no broken-symmetry mode.