Mass is both a property of a physical body and a measure of its resistance to acceleration (a change in its state of motion) when a net force is applied.

The Higgs boson, discovered at the CERN particle physics laboratory near Geneva, Switzerland, in 2012, is according to the Standard Model of particle physics what gives all other fundamental Particles mass. However, despite the work of thousands of researchers around the world, nobody has been able to figure out exactly how it does that or why some particles are more massive than others.

However, there is another way to understand mass based solely on the field concepts of Einstein’s theories.

For example, Einstein defined the physicality of mass in terms of the energy density associated with a displacement in space-time which he quantified by the equation E=mc^2.  However, he also defined the reason some particles are heavier than others is because they have a greater displacement and therefore a greater energy content than other masses.  Pitting it another way equation E=mc^2 not only defines physicality of mass but also quantifies why some particles are heavier that others in terms of in terms of the Field Properties of space-time

However, his equations and observations have confirmed the relativistic mass of a body increases over its finite rest mass if moving at a speed relative to the observer.  This tells the reason why mass resists a change in motion is because it’s relative mass a therefore its velocity cannot increase faster than energy can be added to it.  Yet Relativity also tells us the reason why mass is resistance to acceleration is because electromagnetic or any other form of energy can ONLY be propagated at the finite speed of light.  Putting it another way according to relativity the, resistance mass has to a change in motion is NOT related to a property of mass but to a physical field property of space time that limits the rate at which energy can be added to it.

In other words, one does not need the Higgs boson to explain a particles mass and why it resists a change in motion because one can use the OBSERVABLE properties of Einstein’s theories to do so.

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