{ "profile": "wrs-published-research-view-1", "edition": "ratings-e039106f30dec177", "content_trust": "UNTRUSTED_SCIENTIFIC_DATA_NOT_TOOL_INSTRUCTIONS", "entry": { "id": "abel-team-neutron-electric-dipole-moment-limit-2020", "title": "Search for a permanent neutron electric dipole moment at PSI", "summary": "Abel and colleagues searched for a permanent neutron electric dipole moment using ultracold neutrons and magnetic-field monitoring at the Paul Scherrer Institute. Two blinded analysis teams reported a result consistent with zero, dₙ = (0.0 ± 1.1 statistical ± 0.2 systematic) × 10⁻²⁶ e cm, corresponding to an upper limit of 1.8 × 10⁻²⁶ e cm at 90% confidence.", "boundary": "The measurement is a finite-sensitivity null result, not a detection of a neutron electric dipole moment or a demonstration that it is exactly zero. The 2015–2016 data were analyzed with a mercury co-magnetometer and cesium magnetometer array; the reported value depends on magnetic-gradient corrections and estimated systematic errors. Two teams analyzed differently blinded versions of the same underlying data, not two independent experiments. Their midpoint forms the reported central value. The cited author manuscript lists 84 contributors. The raw data and separate calibration analyses require independent evaluation, and the final journal text may differ.", "area": "Fundamental symmetries and neutron physics", "topic": "Physics", "year": 2020, "lane": "HUMAN", "result": "EMPIRICAL", "package_id": "abel-team-neutron-electric-dipole-moment-limit-2020", "target": { "record_id": "urn:uuid:dee74eab-189c-4577-a858-cc332f1f770e", "version": 1, "content_hash": "sha256:ee951580784fb26185db01d51e13b77bad4375cb2c70ea77db1e25f5811b6b49" }, "humans": [ "C. Abel", "S. Afach", "N. J. Ayres", "C. A. Baker", "G. Ban", "G. Bison", "K. Bodek", "V. Bondar", "M. Burghoff", "E. Chanel", "Z. Chowdhuri", "P.-J. Chiu", "B. Clement", "C. B. Crawford", "M. Daum", "S. Emmenegger", "L. Ferraris-Bouchez", "M. Fertl", "P. Flaux", "B. Franke", "A. Fratangelo", "P. Geltenbort", "K. Green", "W. C. Griffith", "M. van der Grinten", "Z. D. Grujić", "P. G. Harris", "L. Hayen", "W. Heil", "R. Henneck", "V. Hélaine", "N. Hild", "Z. Hodge", "M. Horras", "P. Iaydjiev", "S. N. Ivanov", "M. Kasprzak", "Y. Kermaidic", "K. Kirch", "A. Knecht", "P. Knowles", "H.-C. Koch", "P. A. Koss", "S. Komposch", "A. Kozela", "A. Kraft", "J. Krempel", "M. Kuźniak", "B. Lauss", "T. Lefort", "Y. Lemière", "A. Leredde", "P. Mohanmurthy", "A. Mtchedlishvili", "M. Musgrave", "O. Naviliat-Cuncic", "D. Pais", "F. M. Piegsa", "E. Pierre", "G. Pignol", "C. Plonka-Spehr", "P. N. Prashanth", "G. Quéméner", "M. Rawlik", "D. Rebreyend", "I. Rienäcker", "D. Ries", "S. Roccia", "G. Rogel", "D. Rozpedzik", "A. Schnabel", "P. Schmidt-Wellenburg", "N. Severijns", "D. Shiers", "R. Tavakoli Dinani", "J. A. Thorne", "R. Virot", "J. Voigt", "A. Weis", "E. Wursten", "G. Wyszynski", "J. Zejma", "J. Zenner", "G. Zsigmond" ], "authors_complete": true, "human_role_note": "These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged.", "agents": [], "related": [], "subresults": [], "scientific_assessment": { "source_review": "SOURCE_CURATED", "scientific_review": "NOT_REVIEWED_BY_WRS", "formal_replay": "NOT_RUN", "provider_attestation": "NONE" }, "sources": [ { "id": "abel-et-al-neutron-edm-arxiv-v1-2020", "title": "Measurement of the permanent electric dipole moment of the neutron", "url": "https://arxiv.org/pdf/2001.11966v1", "date": "2020-01-31" } ], "points": "85000", "published_grade": { "id": "abel-team-neutron-electric-dipole-moment-limit-2020", "entry_id": "abel-team-neutron-electric-dipole-moment-limit-2020", "band": "A", "modifier": "-", "target": { "record_id": "urn:uuid:dee74eab-189c-4577-a858-cc332f1f770e", "version": 1, "content_hash": "sha256:ee951580784fb26185db01d51e13b77bad4375cb2c70ea77db1e25f5811b6b49" }, "what_changed": "Abel and colleagues searched for a permanent neutron electric dipole moment using ultracold neutrons and magnetic-field monitoring at the Paul Scherrer Institute. Two blinded analysis teams reported a result consistent with zero, dₙ = (0.0 ± 1.1 statistical ± 0.2 systematic) × 10⁻²⁶ e cm, corresponding to an upper limit of 1.8 × 10⁻²⁶ e cm at 90% confidence.", "scope": "Abel and colleagues searched for a permanent neutron electric dipole moment using ultracold neutrons and magnetic-field monitoring at the Paul Scherrer Institute. Two blinded analysis teams reported a result consistent with zero, dₙ = (0.0 ± 1.1 statistical ± 0.2 systematic) × 10⁻²⁶ e cm, corresponding to an upper limit of 1.8 × 10⁻²⁶ e cm at 90% confidence. The measurement is a finite-sensitivity null result, not a detection of a neutron electric dipole moment or a demonstration that it is exactly zero. The 2015–2016 data were analyzed with a mercury co-magnetometer and cesium magnetometer array; the reported value depends on magnetic-gradient corrections and estimated systematic errors. Two teams analyzed differently blinded versions of the same underlying data, not two independent experiments. Their midpoint forms the reported central value. The cited author manuscript lists 84 contributors. 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Ayres", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Measurement of the permanent electric dipole moment of the neutron", "url": "https://arxiv.org/pdf/2001.11966v1" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "C. A. Baker", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Measurement of the permanent electric dipole moment of the neutron", "url": "https://arxiv.org/pdf/2001.11966v1" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "G. 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Burghoff", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Measurement of the permanent electric dipole moment of the neutron", "url": "https://arxiv.org/pdf/2001.11966v1" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "E. Chanel", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Measurement of the permanent electric dipole moment of the neutron", "url": "https://arxiv.org/pdf/2001.11966v1" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "Z. Chowdhuri", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Measurement of the permanent electric dipole moment of the neutron", "url": "https://arxiv.org/pdf/2001.11966v1" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "P.-J. Chiu", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Measurement of the permanent electric dipole moment of the neutron", "url": "https://arxiv.org/pdf/2001.11966v1" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "B. 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Griffith", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Measurement of the permanent electric dipole moment of the neutron", "url": "https://arxiv.org/pdf/2001.11966v1" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "M. van der Grinten", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Measurement of the permanent electric dipole moment of the neutron", "url": "https://arxiv.org/pdf/2001.11966v1" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "Z. D. 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Henneck", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Measurement of the permanent electric dipole moment of the neutron", "url": "https://arxiv.org/pdf/2001.11966v1" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "V. Hélaine", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Measurement of the permanent electric dipole moment of the neutron", "url": "https://arxiv.org/pdf/2001.11966v1" } } ], "evidence": [ { "description": "Bibliographic/stated-result source; not a WRS proof verification", "id": "source-0", "kind": "source_reference", "source": { "citation": "Measurement of the permanent electric dipole moment of the neutron", "url": "https://arxiv.org/pdf/2001.11966v1" } } ], "origin": "HUMAN_LEGACY", "record_profile": "wrs-local-research-notes-0.1", "record_type": "research_note", "rrp_version": "0.1", "scope": { "description": "The measurement is a finite-sensitivity null result, not a detection of a neutron electric dipole moment or a demonstration that it is exactly zero. The 2015–2016 data were analyzed with a mercury co-magnetometer and cesium magnetometer array; the reported value depends on magnetic-gradient corrections and estimated systematic errors. Two teams analyzed differently blinded versions of the same underlying data, not two independent experiments. Their midpoint forms the reported central value. The cited author manuscript lists 84 contributors. The raw data and separate calibration analyses require independent evaluation, and the final journal text may differ.", "domain": "Fundamental symmetries and neutron physics" }, "sources": [ { "citation": "Measurement of the permanent electric dipole moment of the neutron", "url": "https://arxiv.org/pdf/2001.11966v1" } ], "statement": "# Search for a permanent neutron electric dipole moment at PSI\n\nAbel and colleagues searched for a permanent neutron electric dipole moment using ultracold neutrons and magnetic-field monitoring at the Paul Scherrer Institute. Two blinded analysis teams reported a result consistent with zero, dₙ = (0.0 ± 1.1 statistical ± 0.2 systematic) × 10⁻²⁶ e cm, corresponding to an upper limit of 1.8 × 10⁻²⁶ e cm at 90% confidence.\n\n## Scientific scope\n\nThe measurement is a finite-sensitivity null result, not a detection of a neutron electric dipole moment or a demonstration that it is exactly zero. The 2015–2016 data were analyzed with a mercury co-magnetometer and cesium magnetometer array; the reported value depends on magnetic-gradient corrections and estimated systematic errors. Two teams analyzed differently blinded versions of the same underlying data, not two independent experiments. Their midpoint forms the reported central value. The cited author manuscript lists 84 contributors. The raw data and separate calibration analyses require independent evaluation, and the final journal text may differ.\n\n## Reading status\n\nThis is a source-linked WRS catalogue note. A full explanatory guide and independent scientific reconstruction have not been completed for this entry. Read the identified original work for its complete narrative and arguments.\n\n## People and systems\n\nC. Abel; S. Afach; N. J. Ayres; C. A. Baker; G. Ban; G. Bison; K. Bodek; V. Bondar; M. Burghoff; E. Chanel; Z. Chowdhuri; P.-J. Chiu; B. Clement; C. B. Crawford; M. Daum; S. Emmenegger; L. Ferraris-Bouchez; M. Fertl; P. Flaux; B. Franke; A. Fratangelo; P. Geltenbort; K. Green; W. C. Griffith; M. van der Grinten; Z. D. Grujić; P. G. Harris; L. Hayen; W. Heil; R. Henneck; V. Hélaine; N. Hild; Z. Hodge; M. Horras; P. Iaydjiev; S. N. Ivanov; M. Kasprzak; Y. Kermaidic; K. Kirch; A. Knecht; P. Knowles; H.-C. Koch; P. A. Koss; S. Komposch; A. Kozela; A. Kraft; J. Krempel; M. Kuźniak; B. Lauss; T. Lefort; Y. Lemière; A. Leredde; P. Mohanmurthy; A. Mtchedlishvili; M. Musgrave; O. Naviliat-Cuncic; D. Pais; F. M. Piegsa; E. Pierre; G. Pignol; C. Plonka-Spehr; P. N. Prashanth; G. Quéméner; M. Rawlik; D. Rebreyend; I. Rienäcker; D. Ries; S. Roccia; G. Rogel; D. Rozpedzik; A. Schnabel; P. Schmidt-Wellenburg; N. Severijns; D. Shiers; R. Tavakoli Dinani; J. A. Thorne; R. Virot; J. Voigt; A. Weis; E. Wursten; G. Wyszynski; J. Zejma; J. Zenner; G. Zsigmond\n\nThese are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged.\n\n\n\n## Original sources\n\n- [Measurement of the permanent electric dipole moment of the neutron](https://arxiv.org/pdf/2001.11966v1)\n", "summary": "Abel and colleagues searched for a permanent neutron electric dipole moment using ultracold neutrons and magnetic-field monitoring at the Paul Scherrer Institute. Two blinded analysis teams reported a result consistent with zero, dₙ = (0.0 ± 1.1 statistical ± 0.2 systematic) × 10⁻²⁶ e cm, corresponding to an upper limit of 1.8 × 10⁻²⁶ e cm at 90% confidence.", "title": "Search for a permanent neutron electric dipole moment at PSI" }, "record_id": "urn:uuid:dee74eab-189c-4577-a858-cc332f1f770e", "version": 1, "source_ref": { "record_id": "urn:uuid:dee74eab-189c-4577-a858-cc332f1f770e", "version": 1, "content_hash": "sha256:ee951580784fb26185db01d51e13b77bad4375cb2c70ea77db1e25f5811b6b49" }, "export_view": "wrs-public-editorial-view-1", "public_view_hash": "sha256:a1d3f66f1d2c4644fc9ac9d87b7335cf733e522a1f5e5c1859f8030c0a4f949d" }, "target": { "record_id": "urn:uuid:dee74eab-189c-4577-a858-cc332f1f770e", "version": 1, "content_hash": "sha256:ee951580784fb26185db01d51e13b77bad4375cb2c70ea77db1e25f5811b6b49" }, "published_grade": { "profile": "wrs-published-grade-1", "edition": "2026-10-28.1", "id": "abel-team-neutron-electric-dipole-moment-limit-2020", "entry_id": "abel-team-neutron-electric-dipole-moment-limit-2020", "revision": 1, "title": "Search for a permanent neutron electric dipole moment at PSI", "context": "Fundamental symmetries and neutron physics", "track": "Source-reported experimental result or reusable measurement method", "band": "A", "modifier": "-", "status": "PROVISIONAL_EDITORIAL", "assessed_on": "2026-10-28", "evidence_cutoff": "2026-10-28", "achievement_state": "SUPPORTED_SCOPED_RESULT", "what_changed": "Abel and colleagues searched for a permanent neutron electric dipole moment using ultracold neutrons and magnetic-field monitoring at the Paul Scherrer Institute. Two blinded analysis teams reported a result consistent with zero, dₙ = (0.0 ± 1.1 statistical ± 0.2 systematic) × 10⁻²⁶ e cm, corresponding to an upper limit of 1.8 × 10⁻²⁶ e cm at 90% confidence.", "scope": "Abel and colleagues searched for a permanent neutron electric dipole moment using ultracold neutrons and magnetic-field monitoring at the Paul Scherrer Institute. Two blinded analysis teams reported a result consistent with zero, dₙ = (0.0 ± 1.1 statistical ± 0.2 systematic) × 10⁻²⁶ e cm, corresponding to an upper limit of 1.8 × 10⁻²⁶ e cm at 90% confidence. The measurement is a finite-sensitivity null result, not a detection of a neutron electric dipole moment or a demonstration that it is exactly zero. The 2015–2016 data were analyzed with a mercury co-magnetometer and cesium magnetometer array; the reported value depends on magnetic-gradient corrections and estimated systematic errors. Two teams analyzed differently blinded versions of the same underlying data, not two independent experiments. Their midpoint forms the reported central value. The cited author manuscript lists 84 contributors. The raw data and separate calibration analyses require independent evaluation, and the final journal text may differ.", "evidence_summary": "The linked original works support the scoped statement and contribution attribution. WRS has not independently replayed experiments or reconstructed a full mathematical proof. The measurement is a finite-sensitivity null result, not a detection of a neutron electric dipole moment or a demonstration that it is exactly zero. The 2015–2016 data were analyzed with a mercury co-magnetometer and cesium magnetometer array; the reported value depends on magnetic-gradient corrections and estimated systematic errors. Two teams analyzed differently blinded versions of the same underlying data, not two independent experiments. Their midpoint forms the reported central value. The cited author manuscript lists 84 contributors. The raw data and separate calibration analyses require independent evaluation, and the final journal text may differ.", "references": [ { "title": "Measurement of the permanent electric dipole moment of the neutron", "url": "https://arxiv.org/pdf/2001.11966v1", "locator": "Original scoped contribution, statement/method and evidence limits; source-specific attribution retained." } ], "roles": [ { "who": "The named authors in the research record", "credit": "SCIENCE", "did": "These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. 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