{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"4105ac93597a9f4819a58a3c5ecde670ad657f8b7b247fe87a4b50e8b754204d","created":"2026-10-03T07:17:53Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"44e447a26501f01139f679b2a7ed85ed1b261628f2c8d6bcc6831b0d91142089","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"value","assisted_by":[],"external_id":"amo.electric-dipole-moments.schiff-moment-theory","kind":"well-posed","literature_status":"open","n":"1","parents":[],"plain":"Atoms like mercury and radium are sensitive to time-reversal violation inside the nucleus, through a quantity called the Schiff moment (the part of the nuclear charge distribution that the electrons cannot screen). Turning atomic measurements into statements about quarks and gluons needs the Schiff moment computed reliably, and present calculations disagree by large factors.","posed_since":"","precise":"Compute the coefficients $a_{0},a_{1},a_{2}$ relating the nuclear Schiff moment $S$ of Hg-199 and of octupole-deformed Ra-225 (or Th-229) to the isoscalar, isovector and isotensor pion-nucleon CP-odd couplings $g_{\\pi}^{(0,1,2)}$, with quantified uncertainties below 30%. The answer is a table of coefficients with error bars from an ab initio or uncertainty-quantified nuclear method.","problem_ref":null,"references":"","settled_by":"Agreement of two independent many-body methods (for example ab initio and symmetry-restricted density functional) on the Schiff coefficients within their quoted uncertainties.","status_note":"","title":"Controlled nuclear-theory values for Schiff moments of Hg-199 and Ra-225","topic_ref":"c246b9f50df025b5d8ac429d18d9f7456b8697e6ae051e6f2f11e3e2464e02b9"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"d884a85520382e2f72c2514be779b97400b880e8966516818b98956a4ad87ed2","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"43ee50cb30449c49bf6c7df969fea05b8cd645e16a51daf0e6eada3131ee6eb3","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"ciyhG6UwiU3Zne2eJzODvCsvWqdd7suWupx38Ht0qm_JR1lwyuK1xTJ4lXJcZwucMEnJpNZycdW7PLe_NzSuAg"},"schema":"pubphys.envelope/1"},"record_hash":"d884a85520382e2f72c2514be779b97400b880e8966516818b98956a4ad87ed2","leaf_index":408}