The invariant mass of the system is also conserved, but does not change with different observers.

In this case, conservation of invariant mass of the system also will no longer hold.

The invariant mass is another name for the rest mass of single particles.

This minimum kinetic energy contributes to the invariant mass of the system as a whole.

This invariant mass is the same in all frames of reference (see also special relativity).

The term invariant mass is also used in inelastic scattering experiments.

The term also applies to the invariant mass of systems when the system as a whole is not "moving" (has no net momentum).

The concept of invariant mass does not require bound systems of particles, however.

Though such actions may change the total energy or momentum of the bound system, they do not change its invariant mass.

The rest and invariant masses are the smallest possible value of the mass of the object or system.

Any real work uses invariant mass exclusively for the same reason that feet and meters, etc are not commonly mixed.

In this case, invariant mass is positive and is referred to as the rest mass.

The same is true for massless particles in such system, which add invariant mass and also rest mass to systems, according to their energy.

It is only the invariant mass of a two-photon system that can be used to make a single particle with the same rest mass.

The invariant mass is the ratio of four-momentum to four-velocity:

In special relativity, the term; 'invariant mass' means the same as if we would say; (Aristotle's)substance of mass.

In such a system, the mass which the scale weighs is the invariant mass, and it depends on the total energy of the system.

In special relativity, the invariant mass of a single particle is always Lorentz invariant.

Thus, unlike the invariant mass, the relativistic mass depends on the observer's frame of reference.

Invariant mass, however, is both conserved and invariant (all single observers see the same value, which does not change over time).

Again, neither the relativistic nor the invariant mass of totally-closed (that is, isolated) systems changes when new particles are created.

Just as the relativistic mass of closed system is conserved through time, so also is its invariant mass.

Neither energy nor invariant mass can be destroyed in special relativity, and each is separately conserved over time in closed systems.

The invariant mass is the relativistic mass of the system when viewed in the center of momentum frame.

The invariant mass of the system is actually given by the relativistic invariant relation: