{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:NMSDQOU7KP2JS3S7A73SNS6DGU","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":"653224ca30a22741cd58fc9ee5a407866086a2a1fe982cf91c7a7a6f076be279","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2009-12-28T17:11:54Z","title_canon_sha256":"612099a3495667591ff9deb8288263978083a999285288433a8606a6255b4600"},"schema_version":"1.0","source":{"id":"0912.5194","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0912.5194","created_at":"2026-05-18T04:42:03Z"},{"alias_kind":"arxiv_version","alias_value":"0912.5194v2","created_at":"2026-05-18T04:42:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0912.5194","created_at":"2026-05-18T04:42:03Z"},{"alias_kind":"pith_short_12","alias_value":"NMSDQOU7KP2J","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"NMSDQOU7KP2JS3S7","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"NMSDQOU7","created_at":"2026-05-18T12:26:00Z"}],"graph_snapshots":[{"event_id":"sha256:72850270df8211af7e4f699b1add2861a52524df07084ae9a1c20403396f7d87","target":"graph","created_at":"2026-05-18T04:42:03Z","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 phenomenological analysis of the $\\cos 2 \\phi$ asymmetry recently measured by the COMPASS and HERMES collaborations in unpolarized semi-inclusive deep inelastic scattering. In the kinematical regimes explored by these experiments the asymmetry arises from transverse-spin and intrinsic transverse-momentum effects. We consider the leading-twist contribution, related to the so-called Boer-Mulders transverse-polarization distribution $h_1^{\\perp}(x, k_T^2)$, and the twist-4 Cahn contribution, involving unpolarized transverse-momentum distribution functions. We show that a reasonably g","authors_text":"Alexei Prokudin, Stefano Melis, Vincenzo Barone","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2009-12-28T17:11:54Z","title":"The Boer-Mulders effect in unpolarized SIDIS: an analysis of the COMPASS and HERMES data on the $\\cos 2 \\phi$ asymmetry"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0912.5194","kind":"arxiv","version":2},"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":"sha256:4b77481de57338f004376d6a86091d50f367ef2d0833934a461a520a60ca7baf","target":"record","created_at":"2026-05-18T04:42:03Z","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":"653224ca30a22741cd58fc9ee5a407866086a2a1fe982cf91c7a7a6f076be279","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2009-12-28T17:11:54Z","title_canon_sha256":"612099a3495667591ff9deb8288263978083a999285288433a8606a6255b4600"},"schema_version":"1.0","source":{"id":"0912.5194","kind":"arxiv","version":2}},"canonical_sha256":"6b24383a9f53f4996e5f07f726cbc33512eea245b76486def451bfff8ae58aa7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6b24383a9f53f4996e5f07f726cbc33512eea245b76486def451bfff8ae58aa7","first_computed_at":"2026-05-18T04:42:03.923106Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:42:03.923106Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"37rT3rtxhUtmixcJDVrk+MZsesXVKKYBfO9IQ8poyCCxTyI2RkdeXkvjHM1MBHzmdb/vdpFcU6MSxzdzbKz0AA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:42:03.923517Z","signed_message":"canonical_sha256_bytes"},"source_id":"0912.5194","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4b77481de57338f004376d6a86091d50f367ef2d0833934a461a520a60ca7baf","sha256:72850270df8211af7e4f699b1add2861a52524df07084ae9a1c20403396f7d87"],"state_sha256":"fa578f0d053d5747785b0663eda00925dd694d455636c799a54b3e77c20b09a1"}