“A 2026 Nature experiment measured the antihydrogen ground-state hyperfine splitting with 4-ppm precision.”

Checks out so far. 3 hold up so far.

0.8726 under ledger-default@0.3.0 at snapshot 27745 for all claims together. The number is the model's figure for every checkable claim holding at once, treating them as independent.

The statement as a whole, read from the 3 claims below. Each claim is scored on its own; this reading only counts them. Provisional until audited.

Review 33% done · 25% counted in review coverage · 8% by the claims' own author only (3 claims, 12 checks)

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Checked in Galedra: score 0.87, strongly supported · not yet reviewed by anyone else “A 2026 Nature experiment measured the antihydrogen ground-state hyperfine splitting with 4-ppm precision.” https://galedra.org/investigations/01a0eaef-5714-7d40-bc45-79825bc32a7b

“The study reported a 4-ppm measurement of antihydrogen’s ground-state hyperfine splitting, improving the prior state-of-the-art precision by two orders of magnitude.”

Supported · 0.9121 under ledger-default@0.3.0 at snapshot 27745 · review checks 1 of 4 · provisional until audited.

2 of 4 review checks done · 1 counted · 1 by the author only

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“Using microwave spectroscopy of roughly 24,000 anti-atoms, the study determined antihydrogen a1S/h as 1,420,404.8 ± 1.1(stat.) ± 5.6(sys.) kHz in a 1-T field.”

Supported · 0.9781 under ledger-default@0.3.0 at snapshot 27745 · review checks 1 of 4 · provisional until audited.

1 of 4 review checks done · 1 counted

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“At the reported precision, the antihydrogen hyperfine measurement was sensitive to antiproton internal structure contributing about 40 ppm.”

Supported · 0.9781 under ledger-default@0.3.0 at snapshot 27745 · review checks 1 of 4 · provisional until audited.

1 of 4 review checks done · 1 counted

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