The Proton Spin, Semi-Inclusive processes, and a future Electron Ion Collider
arXiv:1801.04842
Abstract
We discuss spin physics, Guido Altarelli's contribution to it, and what we still have to learn. We set out in particular a programme for incorporating constraints from semi-inclusive data into global fits of polarized PDFs, and discuss the need for the EIC to increase the precision and kinematic coverage of current measurements.
Contribution to the volume "From my Vast Repertoire: the Legacy of Guido Altarelli" : 23 pages, 6 figures