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The smallness of the result and the relative weight between its components, ${\\Gamma_{\\gamma\\gamma\\to S_1}\\over \\Gamma{ \\gamma\\gamma\\to\\pi\\pi\\to S_1}} < 1$, suggests that the scalar $0^{++}$ meson is mainly a $Q^2\\bar{Q}^2$ state."},"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":"1504.06505","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2015-04-24T13:41:53Z","cross_cats_sorted":[],"title_canon_sha256":"e62716d5695457292d404e581cdedfc6e77af10d6fe536b51fd0684948bfebd2","abstract_canon_sha256":"bcab21ec8b3cd71753ac9fc96250705674a0819259920056aae62200e0bd7b07"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:28:56.561631Z","signature_b64":"Od9o6H6mjQpTS8p4tU/mW1oCv3KEDaiOt+groV7cy+493pj6t72BE3kaIfpUNgxCUUukOFhxaeFM82p5tLdBDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fb1d67bb1cfbe7d681f3c2751aa48fe274be0d7ab7c8e58d812cf02ef3f02649","last_reissued_at":"2026-05-18T01:28:56.560944Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:28:56.560944Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Insights into $Q^2 \\bar{Q}^2$ states from an effective perspective","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Ll. 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