{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:T5HSW53RHZQF4N2STXQUOL7G63","short_pith_number":"pith:T5HSW53R","schema_version":"1.0","canonical_sha256":"9f4f2b77713e605e37529de1472fe6f6ef5743a71e0a9bec46307e0a5db8f689","source":{"kind":"arxiv","id":"0905.2828","version":1},"attestation_state":"computed","paper":{"title":"Flavour Separation of Helicity Distributions from Deep Inelastic Muon-Deuteron Scattering","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"COMPASS Collaboration: M. Alekseev, et al","submitted_at":"2009-05-18T08:46:05Z","abstract_excerpt":"We present a LO evaluation of helicity densities of valence, \\Delta u_v+\\Delta d_v, non-strange sea, \\Delta\\bar{u}+\\Delta\\bar{d}, and strange quarks, \\Delta s (assumed to be equal to \\Delta\\bar{s}). They have been obtained from the inclusive asymmetry A_{3,d} and the semi-inclusive asymmetries A^{\\pi+}_{1,d}, A^{\\pi-}_{1,d}, A^{K+}_{1,d}, A^{K-}_{1,d} measured in polarised deep inelastic muon-deuteron scattering. The full deuteron statistics of COMPASS (years 2002-2004 and 2006) has been used. The data cover the range Q^2 > 1 (GeV/c)^2 and 0.004<x<0.3. Both non-strange densities are found to b"},"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":"0905.2828","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2009-05-18T08:46:05Z","cross_cats_sorted":[],"title_canon_sha256":"da4335f7f8d2370f93e0387dac33079533e4c68804bd50375a81a85348873bf1","abstract_canon_sha256":"8b3360f53046872155443bb1ac5f619b4ffbf43f5c4ba6cea3668a4ef2583384"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:34:53.083509Z","signature_b64":"LkpbJVBEBnzp2CYstMyPCTRn/rf2joA9soXFLIdxWQZZO9W5D+pm/oillcJm4AanJmAKP1F3DYQZgp+yJuyfCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9f4f2b77713e605e37529de1472fe6f6ef5743a71e0a9bec46307e0a5db8f689","last_reissued_at":"2026-05-18T02:34:53.083121Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:34:53.083121Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Flavour Separation of Helicity Distributions from Deep Inelastic Muon-Deuteron Scattering","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"COMPASS Collaboration: M. Alekseev, et al","submitted_at":"2009-05-18T08:46:05Z","abstract_excerpt":"We present a LO evaluation of helicity densities of valence, \\Delta u_v+\\Delta d_v, non-strange sea, \\Delta\\bar{u}+\\Delta\\bar{d}, and strange quarks, \\Delta s (assumed to be equal to \\Delta\\bar{s}). They have been obtained from the inclusive asymmetry A_{3,d} and the semi-inclusive asymmetries A^{\\pi+}_{1,d}, A^{\\pi-}_{1,d}, A^{K+}_{1,d}, A^{K-}_{1,d} measured in polarised deep inelastic muon-deuteron scattering. The full deuteron statistics of COMPASS (years 2002-2004 and 2006) has been used. The data cover the range Q^2 > 1 (GeV/c)^2 and 0.004<x<0.3. Both non-strange densities are found to b"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0905.2828","kind":"arxiv","version":1},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"0905.2828","created_at":"2026-05-18T02:34:53.083179+00:00"},{"alias_kind":"arxiv_version","alias_value":"0905.2828v1","created_at":"2026-05-18T02:34:53.083179+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0905.2828","created_at":"2026-05-18T02:34:53.083179+00:00"},{"alias_kind":"pith_short_12","alias_value":"T5HSW53RHZQF","created_at":"2026-05-18T12:26:01.383474+00:00"},{"alias_kind":"pith_short_16","alias_value":"T5HSW53RHZQF4N2S","created_at":"2026-05-18T12:26:01.383474+00:00"},{"alias_kind":"pith_short_8","alias_value":"T5HSW53R","created_at":"2026-05-18T12:26:01.383474+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2509.17596","citing_title":"Energy Correlators Resolving Proton Spin","ref_index":8,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/T5HSW53RHZQF4N2STXQUOL7G63","json":"https://pith.science/pith/T5HSW53RHZQF4N2STXQUOL7G63.json","graph_json":"https://pith.science/api/pith-number/T5HSW53RHZQF4N2STXQUOL7G63/graph.json","events_json":"https://pith.science/api/pith-number/T5HSW53RHZQF4N2STXQUOL7G63/events.json","paper":"https://pith.science/paper/T5HSW53R"},"agent_actions":{"view_html":"https://pith.science/pith/T5HSW53RHZQF4N2STXQUOL7G63","download_json":"https://pith.science/pith/T5HSW53RHZQF4N2STXQUOL7G63.json","view_paper":"https://pith.science/paper/T5HSW53R","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0905.2828&json=true","fetch_graph":"https://pith.science/api/pith-number/T5HSW53RHZQF4N2STXQUOL7G63/graph.json","fetch_events":"https://pith.science/api/pith-number/T5HSW53RHZQF4N2STXQUOL7G63/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/T5HSW53RHZQF4N2STXQUOL7G63/action/timestamp_anchor","attest_storage":"https://pith.science/pith/T5HSW53RHZQF4N2STXQUOL7G63/action/storage_attestation","attest_author":"https://pith.science/pith/T5HSW53RHZQF4N2STXQUOL7G63/action/author_attestation","sign_citation":"https://pith.science/pith/T5HSW53RHZQF4N2STXQUOL7G63/action/citation_signature","submit_replication":"https://pith.science/pith/T5HSW53RHZQF4N2STXQUOL7G63/action/replication_record"}},"created_at":"2026-05-18T02:34:53.083179+00:00","updated_at":"2026-05-18T02:34:53.083179+00:00"}