= Discriminant mass invariant of a cubic superpotential
{title2=$\Delta=m^2-2g\kappa$}
Under a <superpotential critical-point shift>, $m\mapsto M=m+gs$ and the linear coefficient vanishes, while $M^2=\Delta$ is unchanged. At either supersymmetric root $v$, the complex <fermion> mass parameter is $W''(v)=\pm\sqrt\Delta$. The physical scalar and <fermion> masses are both $\sqrt{|\Delta|}$, independent of the additive <superpotential> constant. A repeated critical point has a massless multiplet and a quartic leading <scalar potential>.
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