SMRTR Science & EngineeringJul 29, 2026Quanta Magazine

Physicists Solve a Big Quantum Mystery. Now, Old Results Don’t Add Up.

SMRTR summary

For 25 years, physicists believed a tiny mismatch in how particles wobble in magnetic fields might hint at unknown particles. But a 2021 theory update erased that discrepancy — now raising questions about whether older experimental results were actually correct.

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