{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"1f0dc2e8758d508f7b3039cb35195c0655e529e847f28a2d2ce4c0b7ce2f0c7e","created":"2026-10-15T23:43:22Z","files":[],"origin":{"assisted_by":["ai:gpt-5.5"],"kind":"seed"},"parents":["04beebef280d10bd87ccd3d74d38f68257124bc3ecb53c4c28abee6e8f405d87","ce59fb6cd812fc05906d0c60a71c75ea22bc686bcf38e7c3ef7010834d98ee7b"],"salt":"eddd558cd6b159eec18f2029d8a9d01eea7307ad832f7a8ff3a280ef89fb5bba","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"identification","assisted_by":["ai:gpt-5.5"],"external_id":"cosmo.cmb-anomalies.chance-or-physics","kind":"phenomenon","literature_status":"open","n":"2","parents":[],"plain":"Several odd patterns appear on the largest scales of the microwave sky, each with odds of roughly one in a hundred to one in a thousand. With a single sky to look at, it is hard to know if they mean anything.","posed_since":"","precise":"The anomalies are: low quadrupole power, lack of temperature correlation above 60 degrees ($S_1/2$), quadrupole-octopole alignment, hemispherical power asymmetry, the cold spot and an odd-even parity asymmetry, each at $p \\sim 0.1 \\text{ to } 1\\%$ in LCDM, with a posteriori choice of statistics. Decide whether they are flukes or physical by testing predictions fixed in advance on independent data (large-angle E-mode polarization, CMB lensing, galaxy surveys).","problem_ref":"04beebef280d10bd87ccd3d74d38f68257124bc3ecb53c4c28abee6e8f405d87","references":"","settled_by":"Pre-registered tests on large-angle polarization and lensing maps whose outcome under LCDM is predicted conditional on the temperature map.","status_note":"2025 re-analyses of foreground-cleaned low-multipole maps still find the temperature anomalies at similar significance.","title":"Are the CMB large-angle anomalies statistical flukes or physics?","topic_ref":null},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"e1321012de1d5b85a2ea1c9c4ebe3ceb8302ce38ebc74b7611912891539539c9","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"bcb88a609433ad726f2e0ad52625d78cb14d75500dd249901063fd72649123e8","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"-MM3dKv73qBjGH2SCYuejO-YYmDMmAcIq4QOn7BUyI10L6zVLws-XBQelb7issMWn_0fQcc0PB8TTg3z1WHdDw"},"schema":"pubphys.envelope/1"},"record_hash":"e1321012de1d5b85a2ea1c9c4ebe3ceb8302ce38ebc74b7611912891539539c9","leaf_index":3108}