{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:JNSBHUWQL3VSXNW627D25XLXWN","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":"72f889897528bd5a8a18f87724cdad4e21820dc137f030cd106d42cfaf8b634e","cross_cats_sorted":["nucl-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2015-07-17T16:25:16Z","title_canon_sha256":"50e2f20f9b1a477c3e553e6dd536c660a348297bccb7dfc46d6a541b884a5382"},"schema_version":"1.0","source":{"id":"1507.05022","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.05022","created_at":"2026-05-18T01:36:42Z"},{"alias_kind":"arxiv_version","alias_value":"1507.05022v1","created_at":"2026-05-18T01:36:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.05022","created_at":"2026-05-18T01:36:42Z"},{"alias_kind":"pith_short_12","alias_value":"JNSBHUWQL3VS","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_16","alias_value":"JNSBHUWQL3VSXNW6","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_8","alias_value":"JNSBHUWQ","created_at":"2026-05-18T12:29:27Z"}],"graph_snapshots":[{"event_id":"sha256:8f124334668b6321b3927e8ab1c245ab2b36abe017497944c9b782a9f0fdfc72","target":"graph","created_at":"2026-05-18T01:36:42Z","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":"We present a numerical solution of the four-quark Bethe-Salpeter equation for a scalar tetraquark. We find that the four-body equation dynamically generates pseudoscalar poles in the Bethe-Salpeter amplitude. The sensitivity to the pion poles leads to a light isoscalar tetraquark mass M ~ 400 MeV, which is comparable to that of the sigma/f0(500). The masses of its multiplet partners kappa and a0/f0 follow a similar pattern, thereby providing support for the tetraquark interpretation of the light scalar nonet.","authors_text":"Christian S. Fischer, Gernot Eichmann, Walter Heupel","cross_cats":["nucl-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2015-07-17T16:25:16Z","title":"Tetraquarks from the Bethe-Salpeter equation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.05022","kind":"arxiv","version":1},"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":"sha256:046ea3493ae9ca3502d165ae1484621767a65e600d15bb9a2c87da36faee699c","target":"record","created_at":"2026-05-18T01:36:42Z","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":"72f889897528bd5a8a18f87724cdad4e21820dc137f030cd106d42cfaf8b634e","cross_cats_sorted":["nucl-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2015-07-17T16:25:16Z","title_canon_sha256":"50e2f20f9b1a477c3e553e6dd536c660a348297bccb7dfc46d6a541b884a5382"},"schema_version":"1.0","source":{"id":"1507.05022","kind":"arxiv","version":1}},"canonical_sha256":"4b6413d2d05eeb2bb6ded7c7aedd77b35b9e9663cd53a01d2c5d64166579b9ee","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4b6413d2d05eeb2bb6ded7c7aedd77b35b9e9663cd53a01d2c5d64166579b9ee","first_computed_at":"2026-05-18T01:36:42.140520Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:36:42.140520Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VIN16dJVvHzBlDlccqBk92HHR6xZUxP6VaPXo1spSiKlwSPDVMYbbDqCGJyLIMEXd9xBiN9az0RCs2GpWxFHDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:36:42.141279Z","signed_message":"canonical_sha256_bytes"},"source_id":"1507.05022","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:046ea3493ae9ca3502d165ae1484621767a65e600d15bb9a2c87da36faee699c","sha256:8f124334668b6321b3927e8ab1c245ab2b36abe017497944c9b782a9f0fdfc72"],"state_sha256":"0b734fef681386e7a7f509446ac3bc949121d61866c0cbb91e55deea46d184a4"}