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The chi_{cJ}(1P) states (J=0,1,2) are clearly observed with energy resolution between 2.3 to 3.8 MeV, and their masses and the spin-averaged chi_{cJ} mass are determined to be M_{chi_{c0}}=3414.21\\pm 0.39 \\pm 0.27, M_{chi_{c1}}=3510.30\\pm 0.14\\pm 0.16, M_{chi_{c2}}=3555.70\\pm 0.59 \\pm 0.39 and M(^3P_{cog})=3524.85\\pm 0.32 \\pm 0.30 MeV/c^2."},"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/0502031","kind":"arxiv","version":3},"metadata":{"license":"","primary_cat":"hep-ex","submitted_at":"2005-02-16T10:06:49Z","cross_cats_sorted":[],"title_canon_sha256":"bd7affda2fff9a49a989e8ab9001d8e5acc337f896d9f8201b21edc84a71d739","abstract_canon_sha256":"7a39d7d308bb5f7110f17d13a7987987ebf852f345fea0cfa24a450430f0e863"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:17:36.959566Z","signature_b64":"b4SDG4ruhzE7YXFWaygvgR7cYIjLMYG/nJafCLjafMwva2nOf+r4oSrlbTxXFaFdlAK8KGgoghvd090VJZOtDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"eb98ff9196e62b400a20ef1560c487864e5c4591f0dac6d2fb13e13225b56f65","last_reissued_at":"2026-07-04T15:17:36.959060Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:17:36.959060Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Precise measurement of spin-averaged chi_{cJ}(1P) mass using photon conversions in psi(2S) -> gamma chi_{cJ}","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"et al, J. 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