Collins-Super

A graphic showing the lateral motion of a quark (the green ball) inside a proton whose spin is aligned with its direction of motion (the big yellow arrow). Credit: Valerie Lentz, Brookhaven Lab.

Groundbreaking calculations reveal the hidden motion of quarks inside protons

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A new theoretical method enables more accurate calculations of the three-dimensional motion of quarks, and leads to a deeper understanding of the dynamics of the proton spin