Sсiеntifiс Аmеricаn (2019-06)

NUCLEAR PHYSICS

Photographs by Floto + Warner

Where do protons and neutrons get their mass and spin?

Surprisingly, we don’t know. A new facility promises

to peek inside these particles to find answers

By Abhay Deshpande and Rikutaro Yoshida

THE DEEPEST

RECESSES OF

THE ATOM

© 2019 Scientific American © 2019 Scientific American