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Press Release: SLAC Experiment Makes First Observations of Key Traits in Weak Force

Concept illustrations

E158's Rare Interactions

In studying scattering between electrons, the experiment looked for the one weak force interaction out of every one million electromagnetic force interactions. E158 was sensitive to (but did not find) indirect signals from Z' (Z prime) particles, hypothetical fat cousins of Z particles that would carry a yet-be-discovered new force.

E158's Rare Interactions

Illustration by Juna Kurihara, SLAC

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