{"paper":{"title":"Stern--Gerlach Spin Sorting in Relativistic Magnetic Reconnection","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"The Stern-Gerlach force sorts particles by magnetic moment projection across reconnection current sheets near magnetars without altering the reconnection rate.","cross_cats":["astro-ph.HE"],"primary_cat":"physics.plasm-ph","authors_text":"K. Nykyri","submitted_at":"2026-05-15T17:48:48Z","abstract_excerpt":"We introduce a Stern--Gerlach (SG) spin-kinetic control parameter for magnetic reconnection. The fully projected branch parameter, $\\Xi_0=<Z>/r_L$ compares the SG cross-sheet displacement accumulated during a diffusion-region transit with the relativistic Larmor radius. For an ensemble or partially participating population the relevant effective parameter is $\\Xi_{\\rm Eff}=P_{eff}\\Xi _0$, where $P_{eff}$ represents the surviving branch weight or effective spin/moment projection. Evaluating $\\Xi_{\\rm Eff}$ across representative space and astrophysical environments reveals a robust hierarchy: SG"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"We further show, using electron--positron particle-in-cell simulations, that the SG force sorts particles by magnetic-moment projection into opposite sides of a Harris current sheet without measurably changing the global reconnection rate in the tested regime.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The assumption that the fully projected branch parameter Ξ₀ = <Z>/r_L and its effective version Ξ_Eff = P_eff Ξ₀ correctly capture the accumulated SG cross-sheet displacement relative to the relativistic Larmor radius during a diffusion-region transit (as defined in the introduction of the control parameter).","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Introduces the parameter Ξ_Eff to quantify Stern-Gerlach spin sorting in reconnection and reports PIC simulations showing particle sorting by magnetic moment without altering the global reconnection rate.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"The Stern-Gerlach force sorts particles by magnetic moment projection across reconnection current sheets near magnetars without altering the reconnection rate.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"aecf4bbab018446d1329468721cb563d8b85286648aba65584b0c4d299359f26"},"source":{"id":"2605.16243","kind":"arxiv","version":1},"verdict":{"id":"43f21153-49a5-4d12-b37d-f8b64346ccf5","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-19T18:23:52.568190Z","strongest_claim":"We further show, using electron--positron particle-in-cell simulations, that the SG force sorts particles by magnetic-moment projection into opposite sides of a Harris current sheet without measurably changing the global reconnection rate in the tested regime.","one_line_summary":"Introduces the parameter Ξ_Eff to quantify Stern-Gerlach spin sorting in reconnection and reports PIC simulations showing particle sorting by magnetic moment without altering the global reconnection rate.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The assumption that the fully projected branch parameter Ξ₀ = <Z>/r_L and its effective version Ξ_Eff = P_eff Ξ₀ correctly capture the accumulated SG cross-sheet displacement relative to the relativistic Larmor radius during a diffusion-region transit (as defined in the introduction of the control parameter).","pith_extraction_headline":"The Stern-Gerlach force sorts particles by magnetic moment projection across reconnection current sheets near magnetars without altering the reconnection rate."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2605.16243/integrity.json","findings":[],"available":true,"detectors_run":[{"name":"doi_title_agreement","ran_at":"2026-05-19T18:31:18.714116Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"doi_compliance","ran_at":"2026-05-19T18:30:52.333335Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"shingle_duplication","ran_at":"2026-05-19T17:49:42.187875Z","status":"skipped","version":"0.1.0","findings_count":0},{"name":"citation_quote_validity","ran_at":"2026-05-19T17:49:41.797489Z","status":"skipped","version":"0.1.0","findings_count":0},{"name":"ai_meta_artifact","ran_at":"2026-05-19T17:33:23.101155Z","status":"skipped","version":"1.0.0","findings_count":0},{"name":"external_links","ran_at":"2026-05-19T17:31:25.802956Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"claim_evidence","ran_at":"2026-05-19T17:01:55.608885Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"cited_work_retraction","ran_at":"2026-05-19T16:51:57.193767Z","status":"completed","version":"1.0.0","findings_count":0}],"snapshot_sha256":"3716dc44158c40aff0e66901181cdb66be9aa1c795e4acf6df9cde2a40a610ee"},"references":{"count":42,"sample":[{"doi":"","year":1999,"title":"M. A. Shay, J. F. Drake, B. N. Rogers, and R. E. Denton, Geophysical Research Letters26, 2163 (1999)","work_id":"4151c927-9f90-493d-9ed5-afb8eb561eac","ref_index":1,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2014,"title":"J. F. Drake and M. Swisdak, Physics of Plasmas21, 072903 (2014)","work_id":"b31b01d0-916d-4dcd-8e30-3b9a7643ffbb","ref_index":2,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2014,"title":"J. T. Dahlin, J. F. Drake, and M. Swisdak, Physics of Plasmas21, 092304 (2014)","work_id":"eaa1c78b-2e61-44f9-a0d1-f04531effa85","ref_index":3,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2016,"title":"J. L. Burchet al., Science352, aaf2939 (2016)","work_id":"cb2111a9-5bbf-4e11-ab8d-1583fe2c77ff","ref_index":4,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2011,"title":"K. Nykyri, A. Otto, E. Adamson, E. Dougal, and J. 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