  The entropy of the Higgs boson decay probabilities distribution in the
Standard Model (SM) is maximized for a Higgs mass value that is less than one
standard deviation away from the current experimental measurement. This
successful estimate of the Higgs mass encourages us to propose tests of the
Maximum Entropy Principle (MEP) as a tool for theoretical inferences in other
instances of Higgs physics. In this letter, we show that, irrespective of the
extension of the SM predicting a new Higgs boson decay channel, its branching
ratio can be inferred to be around 7% in such a way that the new entropy of
decays still exhibits a maximum at the experimental Higgs mass. This 7% rule
can be tested whenever a new Higgs decay channel is found. In order to
illustrate the MEP predictions, we apply the MEP inference to Higgs portal
models, Higgs-axion interactions, lepton flavour violating decays of the Higgs
boson, and a dark gauge boson model.
