{"paper":{"title":"A precision measurement of the electron's electric dipole moment using trapped molecular ions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"physics.atom-ph","authors_text":"Daniel N. Gresh, Eric A. Cornell, Jun Ye, Kevin C. Cossel, Matt Grau, Tanya S. Roussy, William B. Cairncross, Yan Zhou, Yiqi Ni","submitted_at":"2017-04-25T23:13:30Z","abstract_excerpt":"We describe the first precision measurement of the electron's electric dipole moment (eEDM, $d_e$) using trapped molecular ions, demonstrating the application of spin interrogation times over 700 ms to achieve high sensitivity and stringent rejection of systematic errors. Through electron spin resonance spectroscopy on $^{180}{\\rm Hf}^{19}{\\rm F}^{+}$ in its metastable $^{3}\\Delta_{1}$ electronic state, we obtain $d_e = (0.9 \\pm 7.7_{\\rm stat} \\pm 1.7_{\\rm syst}) \\times 10^{-29}\\,e\\,{\\rm cm}$, resulting in an upper bound of $|d_e| < 1.3 \\times 10^{-28}\\,e\\,{\\rm cm}$ (90% confidence). Our resul"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.07928","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"}