PerspectivePhysics

How Does the Proton Spin?

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Science  23 Mar 2007:
Vol. 315, Issue 5819, pp. 1672-1673
DOI: 10.1126/science.1140165

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Summary

Protons are made of quarks and gluons, but their spins don't add up. New experiments may help resolve this discrepancy.

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