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Chien-Shiung-Wu's groundbreaking demonstration that weak interactions violate mirror symmetry involved measuring the distribution of electrons emitted from a sample of cobalt-60 with polarized nuclear spins (Photo: NIST)
The Q-Weak experimental apparatus at Jefferson Accelerator Laboratory (Photo: NIST)
A schematic drawing of the Q-Weak experiment, showing how the scattered electrons are analyzed and measured (NIST)
Researchers at the Jefferson Accelerator Laboratory have measured the weak charge of the proton for the first time. Early results from the Q-Weak experiment find the weak charge of the proton and the neutron to be consistent with predictions of the Standard Model.
Read the full article: First measurement of proton's weak charge provides no surprises
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