Recent content by nevo

First of all, I asked about the "mass width" because I don't understand this expression. Second, the fact that "They measure a gazillion to get the statistics" is gust a technical mean to learn about the physics, it is still meaningful to ask about one particle. When I check about the muon...

What do you mean by some uncertainty in the mass, is this like uncertainty of the momentum? Is the wave function of the particle is a superposition of eigen vectores with different mass eigen value? Isn't the mass of the particle is the exact value that appear in the hamiltonian?

At the beginning the two decay product did not exist. For instance when a rho particle decay into to pions, its energy in its rest frame is Mc^2. But the decay products, the two pions,generally will have different energy than the original rho. This is, as I understand, the meaning that the...

When we look at a particle's rest frame its energy is Mc^2. But the particle decay has some width, so the products of the particle,generally, will have total energy different than Mc^2. How can it be, is there no energy conservation?