Moving Quarks Help Solve Proton Spin Puzzle

(PhysOrg.com) -- New theory work at the U.S. Department of Energy`s Thomas Jefferson National Accelerator Facility has shown that more than half of the spin of the proton is the result of the movement of its building blocks: quarks. The result, published in the Sept. 5 issue of Physical Review Letters, agrees with recent experiments and supercomputer calculations.

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