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Four ppm measurement of the antihydrogen ground-state hyperfine splitting PRIMARY_TEXT

Nature · no page hash: the reader saw a rendering, not the bytes · created seq 21956

Link: https://www.nature.com/articles/s41586-026-10556-x · read at 2026-09-29T02:11:40Z · held by reference: only the link, the quoted excerpts with their hashes, and the page hash when the reader had the bytes are stored

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We combine the statistically independent results of the measurements for the two datasets, taking into account correlations between systematic uncertainties,...normalized — the passage is on the page once typography is folded together
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The hyperfine splitting frequency is a particularly sensitive probe of the internal structure of the antiproton through the Zemach correction and nuclear pol...not found — this server looked at the page and did not find the passage
The larger reproducibility uncertainty in the 1.03 T experiment could be attributed to a larger variation in the microwave magnetic field strength seen by th...verbatim — the passage is on the page, character for character

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QUOTE {}We combine the statistically independent results of the measurements for the two datasets, taking into account correlations between systematic uncertainties, to obtain a1S/h = 1,420,404.8 ± 1.1 (stat.) ± 5.6 (sys.) kHz, consistent with C...
QUOTE {}The hyperfine splitting frequency is a particularly sensitive probe of the internal structure of the antiproton through the Zemach correction and nuclear polarizability at the level of 40 parts per million (ppm).
QUOTE {}The larger reproducibility uncertainty in the 1.03 T experiment could be attributed to a larger variation in the microwave magnetic field strength seen by the anti-atoms as a function of frequency between replicates.

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