There seem to be several different ways in which mass manifests itself, in particular with reference to fundamental particles:
- Gravitational mass.
- Inertial mass.
- The coupling to the Higgs field.
- The energy and lifetime of virtual particles.
Values for the mass of the fundamental particles are shown on the table in the Standard Model.
As I understand it, gravitational mass relates to the energy of particles through $E=MC^2$ and inertia is a consequence of interaction with the Higgs field and therefore (I presume) a consequence of some constant property of the particle that must be determined by experiment.
But how does this relate to the mass/energy required to create a virtual particle? Is it again the coupling with the Higgs field (and therefore related to inertia) that affects energy required for a particle, or is that relationship indirect? Why are these values the same, if they are the same?