{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:H4N2A2XXWHXFKRFPN57MOMHPEF","short_pith_number":"pith:H4N2A2XX","canonical_record":{"source":{"id":"1208.6126","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2012-08-30T10:10:56Z","cross_cats_sorted":["hep-ex"],"title_canon_sha256":"f0a585634247521c93b6574c3915ebc94ab2736107937b4d926055a25a23a492","abstract_canon_sha256":"c5bfc04120d4ca2ad309b538c967d0aff6887f678d655a601f48f957f27624a4"},"schema_version":"1.0"},"canonical_sha256":"3f1ba06af7b1ee5544af6f7ec730ef21616e2ea49ab1a5140903fd82a4cf2e09","source":{"kind":"arxiv","id":"1208.6126","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1208.6126","created_at":"2026-05-18T00:37:37Z"},{"alias_kind":"arxiv_version","alias_value":"1208.6126v1","created_at":"2026-05-18T00:37:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1208.6126","created_at":"2026-05-18T00:37:37Z"},{"alias_kind":"pith_short_12","alias_value":"H4N2A2XXWHXF","created_at":"2026-05-18T12:27:06Z"},{"alias_kind":"pith_short_16","alias_value":"H4N2A2XXWHXFKRFP","created_at":"2026-05-18T12:27:06Z"},{"alias_kind":"pith_short_8","alias_value":"H4N2A2XX","created_at":"2026-05-18T12:27:06Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:H4N2A2XXWHXFKRFPN57MOMHPEF","target":"record","payload":{"canonical_record":{"source":{"id":"1208.6126","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2012-08-30T10:10:56Z","cross_cats_sorted":["hep-ex"],"title_canon_sha256":"f0a585634247521c93b6574c3915ebc94ab2736107937b4d926055a25a23a492","abstract_canon_sha256":"c5bfc04120d4ca2ad309b538c967d0aff6887f678d655a601f48f957f27624a4"},"schema_version":"1.0"},"canonical_sha256":"3f1ba06af7b1ee5544af6f7ec730ef21616e2ea49ab1a5140903fd82a4cf2e09","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:37:37.547767Z","signature_b64":"R/M9yzzD2SfOfpaEzdCQ80l+Ac+yOBDzuyCojJtWW5WLMq2LAil/cXzxHjo43WX/6+1HNwicj99NfB8ff6g6Dg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3f1ba06af7b1ee5544af6f7ec730ef21616e2ea49ab1a5140903fd82a4cf2e09","last_reissued_at":"2026-05-18T00:37:37.547229Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:37:37.547229Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1208.6126","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:37:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"j3iFBpfgGVoNbN60OuRW3Ac9vvW+/FciKqTQeSbYp69GdyMw7TPcdlIQqZv+8YNJu16H+pnW2jf0IpX+hIDTCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T00:19:41.961344Z"},"content_sha256":"2f0aa69cca1e385b10487a725727cb6e39c5dec15b1bf6d214de60bc54681561","schema_version":"1.0","event_id":"sha256:2f0aa69cca1e385b10487a725727cb6e39c5dec15b1bf6d214de60bc54681561"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:H4N2A2XXWHXFKRFPN57MOMHPEF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Open charm meson production at LHC","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"hep-ph","authors_text":"Antoni Szczurek, Marta Luszczak, Rafal Maciula","submitted_at":"2012-08-30T10:10:56Z","abstract_excerpt":"We discuss charm production at the LHC. The production of single $c \\bar c$ pairs is calculated in the $k_t$-factorization approach. We use Kimber-Martin-Ryskin unintegrated gluon distributions in the proton. The hadronization is included with the help of Peterson fragmentation functions. Transverse momentum and pseudorapidity distributions of charmed mesons are presented and compared to recent results of the ALICE, LHCb and ATLAS collaborations. Furthermore we discuss production of two pairs of $c \\bar c$ within a simple formalism of double-parton scattering (DPS). Surprisingly large cross se"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1208.6126","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:37:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"T0cT8peX7Ckha4E/UWAOeSL2gslNJz+X6JLn5fM00u+27K5DMYO0JoZOWHdSvN6UIqDalSmC9cC7R4pBo20xCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T00:19:41.962021Z"},"content_sha256":"e3cba5bfec16e9fd117ada5cf502b75ec0d48343457f95391e376517e79cb9f2","schema_version":"1.0","event_id":"sha256:e3cba5bfec16e9fd117ada5cf502b75ec0d48343457f95391e376517e79cb9f2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/H4N2A2XXWHXFKRFPN57MOMHPEF/bundle.json","state_url":"https://pith.science/pith/H4N2A2XXWHXFKRFPN57MOMHPEF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/H4N2A2XXWHXFKRFPN57MOMHPEF/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-24T00:19:41Z","links":{"resolver":"https://pith.science/pith/H4N2A2XXWHXFKRFPN57MOMHPEF","bundle":"https://pith.science/pith/H4N2A2XXWHXFKRFPN57MOMHPEF/bundle.json","state":"https://pith.science/pith/H4N2A2XXWHXFKRFPN57MOMHPEF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/H4N2A2XXWHXFKRFPN57MOMHPEF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:H4N2A2XXWHXFKRFPN57MOMHPEF","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":"c5bfc04120d4ca2ad309b538c967d0aff6887f678d655a601f48f957f27624a4","cross_cats_sorted":["hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2012-08-30T10:10:56Z","title_canon_sha256":"f0a585634247521c93b6574c3915ebc94ab2736107937b4d926055a25a23a492"},"schema_version":"1.0","source":{"id":"1208.6126","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1208.6126","created_at":"2026-05-18T00:37:37Z"},{"alias_kind":"arxiv_version","alias_value":"1208.6126v1","created_at":"2026-05-18T00:37:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1208.6126","created_at":"2026-05-18T00:37:37Z"},{"alias_kind":"pith_short_12","alias_value":"H4N2A2XXWHXF","created_at":"2026-05-18T12:27:06Z"},{"alias_kind":"pith_short_16","alias_value":"H4N2A2XXWHXFKRFP","created_at":"2026-05-18T12:27:06Z"},{"alias_kind":"pith_short_8","alias_value":"H4N2A2XX","created_at":"2026-05-18T12:27:06Z"}],"graph_snapshots":[{"event_id":"sha256:e3cba5bfec16e9fd117ada5cf502b75ec0d48343457f95391e376517e79cb9f2","target":"graph","created_at":"2026-05-18T00:37:37Z","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 discuss charm production at the LHC. The production of single $c \\bar c$ pairs is calculated in the $k_t$-factorization approach. We use Kimber-Martin-Ryskin unintegrated gluon distributions in the proton. The hadronization is included with the help of Peterson fragmentation functions. Transverse momentum and pseudorapidity distributions of charmed mesons are presented and compared to recent results of the ALICE, LHCb and ATLAS collaborations. Furthermore we discuss production of two pairs of $c \\bar c$ within a simple formalism of double-parton scattering (DPS). Surprisingly large cross se","authors_text":"Antoni Szczurek, Marta Luszczak, Rafal Maciula","cross_cats":["hep-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2012-08-30T10:10:56Z","title":"Open charm meson production at LHC"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1208.6126","kind":"arxiv","version":1},"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":"sha256:2f0aa69cca1e385b10487a725727cb6e39c5dec15b1bf6d214de60bc54681561","target":"record","created_at":"2026-05-18T00:37:37Z","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":"c5bfc04120d4ca2ad309b538c967d0aff6887f678d655a601f48f957f27624a4","cross_cats_sorted":["hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2012-08-30T10:10:56Z","title_canon_sha256":"f0a585634247521c93b6574c3915ebc94ab2736107937b4d926055a25a23a492"},"schema_version":"1.0","source":{"id":"1208.6126","kind":"arxiv","version":1}},"canonical_sha256":"3f1ba06af7b1ee5544af6f7ec730ef21616e2ea49ab1a5140903fd82a4cf2e09","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3f1ba06af7b1ee5544af6f7ec730ef21616e2ea49ab1a5140903fd82a4cf2e09","first_computed_at":"2026-05-18T00:37:37.547229Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:37:37.547229Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"R/M9yzzD2SfOfpaEzdCQ80l+Ac+yOBDzuyCojJtWW5WLMq2LAil/cXzxHjo43WX/6+1HNwicj99NfB8ff6g6Dg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:37:37.547767Z","signed_message":"canonical_sha256_bytes"},"source_id":"1208.6126","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2f0aa69cca1e385b10487a725727cb6e39c5dec15b1bf6d214de60bc54681561","sha256:e3cba5bfec16e9fd117ada5cf502b75ec0d48343457f95391e376517e79cb9f2"],"state_sha256":"fcaa34750cd55003892637eae684859d57384a59fc68b8038037657935110b60"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+aT6p18kS2lXlPqtNBHZvXgW1cwL+K0tWr7D3TRZdYkuufJdGV3+IKMAN2jUO7shTYK7wIEz2q+TxXk2iM/SCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-24T00:19:41.965240Z","bundle_sha256":"1fca716be2b6fbf2e3365cca902b53bedaba82999d0f047a4f5c8df6322f284b"}}