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With the COBE limit on the $\\mu$ parameter and a homogeneous magnetic field with strength $B\\lesssim 3.2$ nG at the horizon scale, an upper limit on the axion mass is found to be, $m_a\\lesssim 4.8\\times 10^{-5}$ eV for the KSVZ axion model. On the other hand, using the value of excluded axion mass $m_a\\simeq 3.5\\times 10^{-6}$ eV from the ADMX experiment together with the COBE bound on $\\mu$, is found $B\\simeq 46$ nG for the KSVZ axion model and $B\\simeq 130$ nG for D"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1407.1740","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2014-07-07T15:26:20Z","cross_cats_sorted":["astro-ph.CO","gr-qc"],"title_canon_sha256":"be80458f8212e708a563d81dc8ab7195f39841c704cf1f6bd05929807951f5d1","abstract_canon_sha256":"cc751f447766680d38055591f7c83d1d87aebe571864219e013cab78e2de9c1a"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:26:49.218753Z","signature_b64":"hRJgdOj1LjsuaDomwzwNYLV0rTEqcaSfgk1mmyq0ralPIeqiM9VsiNQyg6D/DevpHR574juLsZ2lbPdriaCCCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5b9fde3c6a59c5b45bed86326158d538a805d2587bc25d1e5c1b92bc0ba73762","last_reissued_at":"2026-05-18T01:26:49.218277Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:26:49.218277Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Bounds on QCD axion mass and primordial magnetic field from CMB $\\mu$-distortion","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","gr-qc"],"primary_cat":"hep-ph","authors_text":"Damian Ejlli","submitted_at":"2014-07-07T15:26:20Z","abstract_excerpt":"The oscillation of the CMB photons into axions can cause CMB spectral distortion in the presence of large scale magnetic field. 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On the other hand, using the value of excluded axion mass $m_a\\simeq 3.5\\times 10^{-6}$ eV from the ADMX experiment together with the COBE bound on $\\mu$, is found $B\\simeq 46$ nG for the KSVZ axion model and $B\\simeq 130$ nG for D"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.1740","kind":"arxiv","version":4},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"1407.1740","created_at":"2026-05-18T01:26:49.218355+00:00"},{"alias_kind":"arxiv_version","alias_value":"1407.1740v4","created_at":"2026-05-18T01:26:49.218355+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.1740","created_at":"2026-05-18T01:26:49.218355+00:00"},{"alias_kind":"pith_short_12","alias_value":"LOP54PDKLHC3","created_at":"2026-05-18T12:28:38.356838+00:00"},{"alias_kind":"pith_short_16","alias_value":"LOP54PDKLHC3IW7N","created_at":"2026-05-18T12:28:38.356838+00:00"},{"alias_kind":"pith_short_8","alias_value":"LOP54PDK","created_at":"2026-05-18T12:28:38.356838+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/LOP54PDKLHC3IW7NQYZGCWGVHC","json":"https://pith.science/pith/LOP54PDKLHC3IW7NQYZGCWGVHC.json","graph_json":"https://pith.science/api/pith-number/LOP54PDKLHC3IW7NQYZGCWGVHC/graph.json","events_json":"https://pith.science/api/pith-number/LOP54PDKLHC3IW7NQYZGCWGVHC/events.json","paper":"https://pith.science/paper/LOP54PDK"},"agent_actions":{"view_html":"https://pith.science/pith/LOP54PDKLHC3IW7NQYZGCWGVHC","download_json":"https://pith.science/pith/LOP54PDKLHC3IW7NQYZGCWGVHC.json","view_paper":"https://pith.science/paper/LOP54PDK","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1407.1740&json=true","fetch_graph":"https://pith.science/api/pith-number/LOP54PDKLHC3IW7NQYZGCWGVHC/graph.json","fetch_events":"https://pith.science/api/pith-number/LOP54PDKLHC3IW7NQYZGCWGVHC/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/LOP54PDKLHC3IW7NQYZGCWGVHC/action/timestamp_anchor","attest_storage":"https://pith.science/pith/LOP54PDKLHC3IW7NQYZGCWGVHC/action/storage_attestation","attest_author":"https://pith.science/pith/LOP54PDKLHC3IW7NQYZGCWGVHC/action/author_attestation","sign_citation":"https://pith.science/pith/LOP54PDKLHC3IW7NQYZGCWGVHC/action/citation_signature","submit_replication":"https://pith.science/pith/LOP54PDKLHC3IW7NQYZGCWGVHC/action/replication_record"}},"created_at":"2026-05-18T01:26:49.218355+00:00","updated_at":"2026-05-18T01:26:49.218355+00:00"}