{"paper":{"title":"Sub-Doppler frequency metrology in HD for test of fundamental physics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.atom-ph","authors_text":"E.J. Salumbides, F.M.J. Cozijn, K.S.E. Eikema, P. Dupre, W. Ubachs","submitted_at":"2017-12-22T13:39:35Z","abstract_excerpt":"Weak transitions in the (2,0) overtone band of the HD molecule at $\\lambda = 1.38 \\, \\mu$m were measured in saturated absorption using the technique of noise-immune cavity-enhanced optical heterodyne molecular spectroscopy. Narrow Doppler-free lines were interrogated with a spectroscopy laser locked to a frequency comb laser referenced to an atomic clock to yield transition frequencies [R(1) = $217\\,105\\,181\\,895\\,(20)$ kHz; R(2) = $219\\,042\\,856\\,621\\,(28)$ kHz; R(3) = $220\\,704\\,304\\,951\\,(28)$ kHz] at three orders of magnitude improved accuracy. These benchmark values provide a test of QED "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1712.08438","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}