I got a little puzzled with the concept of hadronic/electromagnetic calorimeter. Do they measure the energy of the particle e.g. an electron, like the first entry of the four-momentum, or the momentum, so the "kinetic" energy?
If I search for it in the internet, I just find, that the particles deposit their energy in the calorimeters, so it can be measured. I think, the electron e.g. cannot deposit all its energy (so the momentum and the 0.5MeV mass) because then its not there anymore and then the charge cannot be conserved.
So how can this fit together?