Theoretical Concepts and Empirical Equivalence: Will the Real Concept Please Stand Up

In the case of the muons, we are measuring the physical process of particle decay. The stability of muons is a direct result of physical constants, or at least what we understand to be constants. It isn’t as if muons are a gear driven clock with a hour, minute, and second hand.

So how do you think velocity would change the physical constants that govern muon decay? What is the mechanism? Einstein’s equations accurately predict observations, so why do you reject the theory?

I would say just the opposite. I don’t see how velocity would change the most basic physical constants that are measured to be the same throughout the universe. Why would velocity change the stability of muons?