{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"3b8be4d9cb159793e0f9cbfc79fec0673b9d844caf4d039f98e0de14ecdd66ff","created":"2026-10-03T07:18:05Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"8ecf4de3f67b3356ec319e72b614e795353876a6698f82c623bfaa8e01a9d86d","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"mechanism","assisted_by":[],"external_id":"hep.baryogenesis.baryon-asymmetry-origin","kind":"phenomenon","literature_status":"open","n":"1","parents":[],"plain":"For every billion antiquarks there were about a billion and one quarks in the early universe. Something broke the matter-antimatter balance, and we do not know what.","posed_since":"1967","precise":"Explain $\\eta_B = n_B/n_\\gamma \\sim 6.1e-10$ (CMB and BBN) satisfying the Sakharov conditions, given that SM CP violation and the SM crossover fail by many orders of magnitude. An answer is a mechanism (thermal or resonant leptogenesis, electroweak baryogenesis, Affleck-Dine, or others) with an independent experimental confirmation.","problem_ref":null,"references":"","settled_by":"Laboratory confirmation of the ingredients of one mechanism, for example lepton number violation plus leptonic CP violation plus heavy neutral leptons for leptogenesis.","status_note":"","title":"Which mechanism produced the cosmic baryon asymmetry?","topic_ref":"c54812d3b8f0845a9a58fc3c5ac18fb1c12d2e71ab9f3fd11422e3dcd5aa26bc"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"80a55df00727257e5ffd06c3456611878d5e3450a708b81f8986a5377faadb26","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"fc036ce03b310e883dac7889a0ff58c5157cc3fd38f4bd6744a7a55d39f17bab","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"2TsOS38uXakrz-nB1m5yo3h2RQT-JsR67EmYyr8NkWKL1lzkzs3GqoWuWKdWduqrhhEKjbq-UZRkwEYVsIMpBQ"},"schema":"pubphys.envelope/1"},"record_hash":"80a55df00727257e5ffd06c3456611878d5e3450a708b81f8986a5377faadb26","leaf_index":1525}