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We measure the following branching fractions B(psi(3770)--> XJ/psi) and significances: (189 +- 20 +- 20) x 10^-5 (11.6sigma) for X=pi^+pi^-, (80 +- 25 +- 16) x 10^-5 (3.4sigma) for X=pi^0pi^0, and (87 +- 33 +- 22) x 10^-5 (3.5sigma) for X=eta, where the errors are statistical and systematic, respectively. The radiative return process e^+e^- -->gamma psi(2S) populates the same event sample and is used to measure Gamma_{ee}[psi(2S)]=(2.54 +"},"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":"hep-ex/0508023","kind":"arxiv","version":3},"metadata":{"license":"","primary_cat":"hep-ex","submitted_at":"2005-08-09T18:37:09Z","cross_cats_sorted":[],"title_canon_sha256":"c62003aaf8e0f5acdc4ccde89f18e2c2b39eafdcf0153e9762991bb7ade2ac38","abstract_canon_sha256":"152a79a28ecc78cf8e26184284f02ef504d53257388f976c7726cda6d024d779"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:25:55.942402Z","signature_b64":"z5RCzvxRwaCOs/N9W/fu5VTSGVkPGfRU65QcWaczCXGjQ7hfuHDwOjU/9rgSpIAcw8+PZIf8cOAnq84CTwmFDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"66feb07452ad6670b2581b56ac6b9d6ad43cd42bdbdc6783fd0b4b69c24896d3","last_reissued_at":"2026-07-04T17:25:55.942042Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:25:55.942042Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Observation of psi(3770)--> pi pi J/psi and Measurement of Gamma_{ee}[psi(2S)]","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"CLEO Collaboration, et al, N.E. 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