Abstract
The Standard Model of Particle Physics includes a significant number of free variables, including the expectation value of the Higgs field. Theory tells us that the masses of both the fermions and the bosons are proportional to this value, but theory does not predict what the proportionality constant should be, we simply measure it. This raises the possibility that one or more of the free parameters is actually changing with time, but that the rate of change is far too tiny for us to observe. Cosmological theory tells us that the rate of expansion of the universe is determined by the total gravitational mass. Assuming for the moment that inertial and gravitational mass are equivalent, then the rate of expansion of the universe is linked somehow to the Higgs’ field. If the rate of expansion is varying, with time, in a way that we don’t expect, this raises the possibility that what we are actually observing is in fact a variation in the Higgs’ field.