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#proton_spin_crisis

Proton spin crisis

Unsolved physics problem

The proton spin crisis is a theoretical crisis precipitated by a 1987 experiment by the European Muon Collaboration (EMC), which tried to determine the distribution of spin within the proton.

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Proton spin crisis Proton Nucleon spin structure Nuclear magnetic moment Electron–ion collider List of unsolved problems in physics Sum rules (quantum field theory) European Muon Collaboration Alexey Anselm Index of physics articles (P)
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