For the first time in a decade, the precision of the fine-structure constant — central to understanding the electromagnetic force — has improved. But even greater accuracy is required to test new physics.
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Czarnecki, A. A finer constant. Nature 442, 516–517 (2006). https://doi.org/10.1038/442516b
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DOI: https://doi.org/10.1038/442516b
