  In supersymmetric theories, there is a scalar quartic related to the top and
bottom yukawas that gives LHC observable decays of the stop or sbottom. After
electroweak symmetry breaking, this quartic induces the decay of the stop
(sbottom) to a charged Higgs and the sbottom (stop) without allowing for the
corresponding channel involving the W boson. Unlike other scalar quartics, this
scalar quartic is measurable at the LHC and for compressed spectra may even be
the discovery channel for the stop or sbottom. Observing this decay and
measuring the value of the quartic interaction would give direct evidence that
the underlying theory is supersymmetric as only a fermionic symmetry can relate
a scalar quartic to a yukawa interaction. This decay pathway is explored and
situations where it can be the dominant decay mode for either the stop or the
sbottom are highlighted. Measurement of this decay mode at the LHC would
unambiguously show that the underlying theory of nature was supersymmetric.
