{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"563fc8392f76aeaca5d746d508836016450f1b2c9f80f809dba423ea82639aaa","created":"2026-10-03T07:18:05Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011","98346228f946fa34c35c0bba2e57e86bbe58ec683f6d3f7ab0b511bb4587c1bc"],"salt":"a89904545e04eb06d9bc1f84538a16068568954da5b6a264f9f650594acf7382","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"classification","assisted_by":[],"external_id":"hep.dama-modulation.southern-hemisphere","kind":"well-posed","literature_status":"open","n":"1","parents":[{"note":"","parent_revision":"98346228f946fa34c35c0bba2e57e86bbe58ec683f6d3f7ab0b511bb4587c1bc","relation":"special_case"}],"plain":"Seasons are reversed in the Southern Hemisphere, but Earth's motion through dark matter is not. A sodium iodide detector in Australia tests whether DAMA's yearly wave follows the seasons or the dark matter.","posed_since":"","precise":"SABRE South (Stawell Underground Physics Laboratory, Australia, about 2900 m water equivalent) operates low-background NaI(Tl) crystals with a liquid scintillator veto. The question is whether its 1-6 keV single-hit rate shows a modulation with amplitude near 0.01 cpd/kg/keV and phase near June 2 (dark matter like), phase shifted by about six months (seasonal environment like), or no modulation.","problem_ref":null,"references":"","settled_by":"A multi-year SABRE South modulation analysis with sensitivity to exclude or confirm the DAMA amplitude at $3\\sigma$ or better, ideally with its twin SABRE North at LNGS.","status_note":"SABRE South completed underground assembly milestones in 2025 with full commissioning planned for 2026.","title":"Does a Southern Hemisphere NaI detector see the same-phase modulation?","topic_ref":"bae30d7e0bff60d245dc8d2942ec787f5c4f8b537f39d87886f379ac68f6e220"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"a8eb6c04ffd077b338870782046254ea54cd663b53d4b6e8da2423b7200f2a62","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"266df00a939c65b05c37e0fb9d5c2c780dc9a35e193bd071c63a0b64727467c1","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"7vbdn0UFnvroBF6J14rL8xE1MTiNTPFhd2DlViActIblJIsin0ARYuTiQzGphJWfAQhsK_neB7Cflv0lDsX5AA"},"schema":"pubphys.envelope/1"},"record_hash":"a8eb6c04ffd077b338870782046254ea54cd663b53d4b6e8da2423b7200f2a62","leaf_index":1532}