“Mass Is Just Energy You Haven’t Met Yet”

Mass isn’t just “‘stuff’ that things can be made out of,” according to University of Copenhagen particle physicist, Matt von Hippel. Rather, mass is what “a high energy of interaction looks like.” 

Von Hippel has a provocative way with words. His claim that mass is energy you haven’t met yet refers to the surprise that, in particle physics, mass is less “stuff” and more a consequence of energy. A proton’s mass, for example, far exceeds the weight of its component quarks. It’s the energy of interaction, according to Von Hippel, that accounts for the extra weight.

His argument should certainly be isolated to its applied field, but it’s too provocative for detainment. When broadly considered against the relationship between parts and wholes, it offers interesting insights. Take, for instance, a book. Intense interactive energy is required to transmute letters, pixels, papers, and ink, glue, and binding into something as weighty as a story. The book in our hands barely compares to the narrative it provokes in our heads.

As in the relationship between a proton and its quarks, the relationship between words and story is not commensurate. Word count accounts for neither a book’s mass nor a story’s heft. Perhaps this is because a book is less a product of the stuff out of which it’s made than a product of the energetic interactions that result in its story.

Elsewhere, writing about the relationship between synchronization and the speed of light, von Hippel points out that our knowledge of the world depends entirely on the models we build to bridge perceptions and our memories. Another name for these models? Stories. Here again, insights from particle physics are relevant, but we already know how much the mass of such stories matters.