Led by Joseph Karpie, researchers reveal that glue in protons contributes significantly to proton spin, while quarks provide only 30% of its spin.
New method combines experimental data and state-of-the-art calculations to reveal proton spin's detailed contributions from the glue that holds protons together. The work, led by Joseph Karpie, could also pave the way for imaging the proton's 3D structure. Originally, physicists thought quarks were the main source of a proton's spin, but now it's known they only contribute around 30%. The rest of the spin comes from two other sources.
May 24, 2024
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