A cosmological explanation for the origin of E=mc2

What is it about?

This paper demonstrates that a particle's rest-mass energy, E=mc2, is probably due to its gravitational interaction with that portion of the cosmos with which it is causally connected.

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Why is it important?

Einstein's famous equation, E=mc2, has been with us for over a century. Today, we believe that inertia is due to the Higgs field. But why this inertia should also be associated with a rest energy has been an enduring mystery all these years. In this paper we provide the first plausible physical explanation for its origin, directly linking particle properties to physics on cosmological scales. In so doing, this paper provides an important perspective on cosmic expansion.