{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:VDLG42CLOR5UDUZP2I25WYDSFE","short_pith_number":"pith:VDLG42CL","canonical_record":{"source":{"id":"1803.07284","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2018-03-20T08:09:01Z","cross_cats_sorted":[],"title_canon_sha256":"7fad7cf8202299b45d94b7d62b11c6040a028d4406266433e7b6791a26a885ef","abstract_canon_sha256":"92f28e6ad0d404cf835f8fa41d0f2fbd376917333a2a0f7cd0195cf7d2e9b081"},"schema_version":"1.0"},"canonical_sha256":"a8d66e684b747b41d32fd235db60722921915426c0264af9d17dd0fa08a6a314","source":{"kind":"arxiv","id":"1803.07284","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.07284","created_at":"2026-05-18T00:00:43Z"},{"alias_kind":"arxiv_version","alias_value":"1803.07284v2","created_at":"2026-05-18T00:00:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.07284","created_at":"2026-05-18T00:00:43Z"},{"alias_kind":"pith_short_12","alias_value":"VDLG42CLOR5U","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_16","alias_value":"VDLG42CLOR5UDUZP","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_8","alias_value":"VDLG42CL","created_at":"2026-05-18T12:32:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:VDLG42CLOR5UDUZP2I25WYDSFE","target":"record","payload":{"canonical_record":{"source":{"id":"1803.07284","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2018-03-20T08:09:01Z","cross_cats_sorted":[],"title_canon_sha256":"7fad7cf8202299b45d94b7d62b11c6040a028d4406266433e7b6791a26a885ef","abstract_canon_sha256":"92f28e6ad0d404cf835f8fa41d0f2fbd376917333a2a0f7cd0195cf7d2e9b081"},"schema_version":"1.0"},"canonical_sha256":"a8d66e684b747b41d32fd235db60722921915426c0264af9d17dd0fa08a6a314","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:00:43.524205Z","signature_b64":"GrmxCElHWbbgWK6JYRcjSdjWL/jL4yFjT5fZCc8Ycr9bU0mi9WV9a/Povc+HQlVx7/bHubimyRdKY1rZuFAkDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a8d66e684b747b41d32fd235db60722921915426c0264af9d17dd0fa08a6a314","last_reissued_at":"2026-05-18T00:00:43.523791Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:00:43.523791Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1803.07284","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:00:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oemBXIfDWbAZawFMSBgfEl+41mBbWHozbdLl6LlFrNC7fwDmEpatWAX+P17Y64pn7npTLv4sOAKGNSjoet/yAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T15:27:43.612794Z"},"content_sha256":"fef5c9176bda829bba1e0e8a82aa59b3eb34c60e4eeca71521c496f79d71f902","schema_version":"1.0","event_id":"sha256:fef5c9176bda829bba1e0e8a82aa59b3eb34c60e4eeca71521c496f79d71f902"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:VDLG42CLOR5UDUZP2I25WYDSFE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Updated study of the $\\eta$-$\\eta'$ mixing and the thermal properties of light pseudoscalar mesons at low temperatures","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Chun-Gui Duan, Xiao-Wei Gu, Zhi-Hui Guo","submitted_at":"2018-03-20T08:09:01Z","abstract_excerpt":"Within the framework of the $U(3)$ chiral perturbation theory, we revisit the masses, decay constants and the mixing parameters of the light pseudoscalar mesons $\\pi, K, \\eta$ and $\\eta'$. The low energy constants up to next-to-next-to-leading order are determined by including the light-quark mass dependences of the various quantities from different lattice QCD simulations and relevant phenomenological inputs. Then we study the finite-temperature behaviors of the masses of the light pseudoscalar mesons. The thermal behaviors of the $\\eta$-$\\eta'$ mixing angles in singlet-octet and quark-flavor"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.07284","kind":"arxiv","version":2},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:00:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"75IIUiYKL3GryK41L3YOHKBaGO+wqiyz3GeSmmH/dMD3PcOmV2pIISOCJrBJVm0LpxpoS6ewV4sUFG/NMuToAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T15:27:43.613449Z"},"content_sha256":"091b1df1506db5dfaae8ccee9d3ef35aba2f6ee002dcb011ade9030408d5efcd","schema_version":"1.0","event_id":"sha256:091b1df1506db5dfaae8ccee9d3ef35aba2f6ee002dcb011ade9030408d5efcd"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VDLG42CLOR5UDUZP2I25WYDSFE/bundle.json","state_url":"https://pith.science/pith/VDLG42CLOR5UDUZP2I25WYDSFE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VDLG42CLOR5UDUZP2I25WYDSFE/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-21T15:27:43Z","links":{"resolver":"https://pith.science/pith/VDLG42CLOR5UDUZP2I25WYDSFE","bundle":"https://pith.science/pith/VDLG42CLOR5UDUZP2I25WYDSFE/bundle.json","state":"https://pith.science/pith/VDLG42CLOR5UDUZP2I25WYDSFE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VDLG42CLOR5UDUZP2I25WYDSFE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:VDLG42CLOR5UDUZP2I25WYDSFE","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"92f28e6ad0d404cf835f8fa41d0f2fbd376917333a2a0f7cd0195cf7d2e9b081","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2018-03-20T08:09:01Z","title_canon_sha256":"7fad7cf8202299b45d94b7d62b11c6040a028d4406266433e7b6791a26a885ef"},"schema_version":"1.0","source":{"id":"1803.07284","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.07284","created_at":"2026-05-18T00:00:43Z"},{"alias_kind":"arxiv_version","alias_value":"1803.07284v2","created_at":"2026-05-18T00:00:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.07284","created_at":"2026-05-18T00:00:43Z"},{"alias_kind":"pith_short_12","alias_value":"VDLG42CLOR5U","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_16","alias_value":"VDLG42CLOR5UDUZP","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_8","alias_value":"VDLG42CL","created_at":"2026-05-18T12:32:59Z"}],"graph_snapshots":[{"event_id":"sha256:091b1df1506db5dfaae8ccee9d3ef35aba2f6ee002dcb011ade9030408d5efcd","target":"graph","created_at":"2026-05-18T00:00:43Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"Within the framework of the $U(3)$ chiral perturbation theory, we revisit the masses, decay constants and the mixing parameters of the light pseudoscalar mesons $\\pi, K, \\eta$ and $\\eta'$. The low energy constants up to next-to-next-to-leading order are determined by including the light-quark mass dependences of the various quantities from different lattice QCD simulations and relevant phenomenological inputs. Then we study the finite-temperature behaviors of the masses of the light pseudoscalar mesons. The thermal behaviors of the $\\eta$-$\\eta'$ mixing angles in singlet-octet and quark-flavor","authors_text":"Chun-Gui Duan, Xiao-Wei Gu, Zhi-Hui Guo","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2018-03-20T08:09:01Z","title":"Updated study of the $\\eta$-$\\eta'$ mixing and the thermal properties of light pseudoscalar mesons at low temperatures"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.07284","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:fef5c9176bda829bba1e0e8a82aa59b3eb34c60e4eeca71521c496f79d71f902","target":"record","created_at":"2026-05-18T00:00:43Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"92f28e6ad0d404cf835f8fa41d0f2fbd376917333a2a0f7cd0195cf7d2e9b081","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2018-03-20T08:09:01Z","title_canon_sha256":"7fad7cf8202299b45d94b7d62b11c6040a028d4406266433e7b6791a26a885ef"},"schema_version":"1.0","source":{"id":"1803.07284","kind":"arxiv","version":2}},"canonical_sha256":"a8d66e684b747b41d32fd235db60722921915426c0264af9d17dd0fa08a6a314","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a8d66e684b747b41d32fd235db60722921915426c0264af9d17dd0fa08a6a314","first_computed_at":"2026-05-18T00:00:43.523791Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:00:43.523791Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GrmxCElHWbbgWK6JYRcjSdjWL/jL4yFjT5fZCc8Ycr9bU0mi9WV9a/Povc+HQlVx7/bHubimyRdKY1rZuFAkDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:00:43.524205Z","signed_message":"canonical_sha256_bytes"},"source_id":"1803.07284","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fef5c9176bda829bba1e0e8a82aa59b3eb34c60e4eeca71521c496f79d71f902","sha256:091b1df1506db5dfaae8ccee9d3ef35aba2f6ee002dcb011ade9030408d5efcd"],"state_sha256":"f7d05ea3e6291577892c6c073864ceca3e06162167d0664e91aca763c87137de"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vn56kG30D7NGW8KL6qGXUXFvF0WL6qIna8iqzBvh2piT16R02Bvf1F+5J/zd48X/TA+/ytK0VZYAkPqRl09sBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-21T15:27:43.616128Z","bundle_sha256":"16e0d2fe3731fbf00530609b05f7f65ef0ba9a19728a2f7410696aee9e536521"}}