If Higgs Couplings Substantially Deviate From Standard Model, The Universe Explodes

If the couplings of the Higgs boson to particles detectable at the Large Hadron Collider (i.e. the relative proportion of Higgs boson decays into different kinds of particles) differ from the Standard Model expected value by more than about 20%, then the vacuum is unstable, and the universe should have exploded by now according to a recent analysis.

Fortunately for us, there is no indication whatsoever that the Higgs boson detected at the LHC differs materially from the Standard Model prediction of its properties.  The fit of the Higgs boson data from the LHC and Fermilab to the Standard Model predictions, indeed, is growing better as more data accumulates.