The invariant mass, rest mass, intrinsic mass, proper mass, or in the case of bound systems simply mass, is the portion of the total mass of an object...

The word "mass" has two meanings in special relativity: invariant mass (also called rest mass) is an invariant quantity which is the same for all observers...

which is independent of the composition of the matter. Rest mass, also called invariant mass, is a fundamental physical property that is independent of...

called relativistic energy) to invariant mass (which is also called rest mass) and momentum. It is the extension of mass–energy equivalence for bodies...

particle physics, the electron mass (symbol: me) is the mass of a stationary electron, also known as the invariant mass of the electron. It is one of the...

kinds of mass are defined: rest mass (invariant mass), and relativistic mass (which increases with velocity). Rest mass is the Newtonian mass as measured...

two reference frames. The mass of an object as measured in its own frame of reference is called its rest mass or invariant mass and is sometimes written...

particle physics, a massless particle is an elementary particle whose invariant mass is zero. At present the only confirmed massless particle is the photon...

four-momentum gives a Lorentz invariant quantity equal (up to factors of the speed of light c) to the square of the particle's proper mass: p ⋅ p = η μ ν p μ p...

The transverse mass is a useful quantity to define for use in particle physics as it is invariant under Lorentz boost along the z direction. In natural...