Theorybased

Physics

Theory-based approach allows access to small lateral motions of quarks within protons

Diagram showing the transverse motion of quarks (green spheres) inside a proton whose spins are aligned in the direction of motion (large yellow arrow). Credit: Valerie Lentz/Brookhaven National Laboratory. Nuclear theorists at Brookhaven National Laboratory and Argonne National Laboratory worked to calculate the Collins-Soper kernel, a quantity that describes how the distribution of transverse momentum of quarks inside a proton…