{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:Y4LHBP5COCLSOZBOJNHDTCBKPM","short_pith_number":"pith:Y4LHBP5C","canonical_record":{"source":{"id":"1504.07455","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2015-04-28T12:53:25Z","cross_cats_sorted":["hep-ph"],"title_canon_sha256":"149353b09f36397b7d5d80b85560d60881348c0892301e47a60e9e8179836896","abstract_canon_sha256":"e405593afb0550d0eb95328c2b134faf898e8a0429bfc1cb555f6de675f95e87"},"schema_version":"1.0"},"canonical_sha256":"c71670bfa2709727642e4b4e39882a7b08038ea8327fb2667505dcd1217de3cc","source":{"kind":"arxiv","id":"1504.07455","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.07455","created_at":"2026-05-18T01:37:10Z"},{"alias_kind":"arxiv_version","alias_value":"1504.07455v3","created_at":"2026-05-18T01:37:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.07455","created_at":"2026-05-18T01:37:10Z"},{"alias_kind":"pith_short_12","alias_value":"Y4LHBP5COCLS","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_16","alias_value":"Y4LHBP5COCLSOZBO","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_8","alias_value":"Y4LHBP5C","created_at":"2026-05-18T12:29:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:Y4LHBP5COCLSOZBOJNHDTCBKPM","target":"record","payload":{"canonical_record":{"source":{"id":"1504.07455","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2015-04-28T12:53:25Z","cross_cats_sorted":["hep-ph"],"title_canon_sha256":"149353b09f36397b7d5d80b85560d60881348c0892301e47a60e9e8179836896","abstract_canon_sha256":"e405593afb0550d0eb95328c2b134faf898e8a0429bfc1cb555f6de675f95e87"},"schema_version":"1.0"},"canonical_sha256":"c71670bfa2709727642e4b4e39882a7b08038ea8327fb2667505dcd1217de3cc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:37:10.853562Z","signature_b64":"Glea4gj/IJY1pUv/2fUYh0CsJLzYrK9l0e7PXQBb/EeZ64lTDCs9clOHT+GCE+pYQ1XJpSqRZ+mjnGJVMqaGAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c71670bfa2709727642e4b4e39882a7b08038ea8327fb2667505dcd1217de3cc","last_reissued_at":"2026-05-18T01:37:10.852912Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:37:10.852912Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1504.07455","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:37:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eDRBf93OD9Bcx06380tE/pyFneQvmipo9w2MtrrAiUIsvWV2q2GC1iECym3AESF+L2aZAJ/jBVyf19MN6ec8AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T04:40:51.520820Z"},"content_sha256":"4852f2a9bf79d90267fca794acda87f0107300fcaaa0b4db2b70d0e19bfa9574","schema_version":"1.0","event_id":"sha256:4852f2a9bf79d90267fca794acda87f0107300fcaaa0b4db2b70d0e19bfa9574"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:Y4LHBP5COCLSOZBOJNHDTCBKPM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Lattice Calculation of Parton Distributions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ph"],"primary_cat":"hep-lat","authors_text":"Christian Wiese, Constantia Alexandrou, Elena Garcia-Ramos, Fernanda Steffens, Karl Jansen, Krzysztof Cichy, Kyriakos Hadjiyiannakou, Vincent Drach","submitted_at":"2015-04-28T12:53:25Z","abstract_excerpt":"We report on our exploratory study for the direct evaluation of the parton distribution functions from lattice QCD, based on a recently proposed new approach. We present encouraging results using Nf = 2 + 1 + 1 twisted mass fermions with a pion mass of about 370 MeV. The focus of this work is a detailed description of the computation, including the lattice calculation, the matching to an infinite momentum and the nucleon mass correction. In addition, we test the effect of gauge link smearing in the operator to estimate the influence of the Wilson line renormalization, which is yet to be done."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.07455","kind":"arxiv","version":3},"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":"2026-05-18T01:37:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ih3WKgyr7DvHCTGM2Vodvw00wd0/uRj64S+u6p3yXgh/9q5r3r/rL07iYX06VehjPbEhglA+zmBcB8c00Jl/Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T04:40:51.521168Z"},"content_sha256":"8a9e481b2fadead81ae66f7572017b9890c2661340219c9e06f0f4994e15ca8b","schema_version":"1.0","event_id":"sha256:8a9e481b2fadead81ae66f7572017b9890c2661340219c9e06f0f4994e15ca8b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Y4LHBP5COCLSOZBOJNHDTCBKPM/bundle.json","state_url":"https://pith.science/pith/Y4LHBP5COCLSOZBOJNHDTCBKPM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Y4LHBP5COCLSOZBOJNHDTCBKPM/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":"2026-05-28T04:40:51Z","links":{"resolver":"https://pith.science/pith/Y4LHBP5COCLSOZBOJNHDTCBKPM","bundle":"https://pith.science/pith/Y4LHBP5COCLSOZBOJNHDTCBKPM/bundle.json","state":"https://pith.science/pith/Y4LHBP5COCLSOZBOJNHDTCBKPM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Y4LHBP5COCLSOZBOJNHDTCBKPM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:Y4LHBP5COCLSOZBOJNHDTCBKPM","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":"e405593afb0550d0eb95328c2b134faf898e8a0429bfc1cb555f6de675f95e87","cross_cats_sorted":["hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2015-04-28T12:53:25Z","title_canon_sha256":"149353b09f36397b7d5d80b85560d60881348c0892301e47a60e9e8179836896"},"schema_version":"1.0","source":{"id":"1504.07455","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.07455","created_at":"2026-05-18T01:37:10Z"},{"alias_kind":"arxiv_version","alias_value":"1504.07455v3","created_at":"2026-05-18T01:37:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.07455","created_at":"2026-05-18T01:37:10Z"},{"alias_kind":"pith_short_12","alias_value":"Y4LHBP5COCLS","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_16","alias_value":"Y4LHBP5COCLSOZBO","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_8","alias_value":"Y4LHBP5C","created_at":"2026-05-18T12:29:50Z"}],"graph_snapshots":[{"event_id":"sha256:8a9e481b2fadead81ae66f7572017b9890c2661340219c9e06f0f4994e15ca8b","target":"graph","created_at":"2026-05-18T01:37:10Z","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 report on our exploratory study for the direct evaluation of the parton distribution functions from lattice QCD, based on a recently proposed new approach. We present encouraging results using Nf = 2 + 1 + 1 twisted mass fermions with a pion mass of about 370 MeV. The focus of this work is a detailed description of the computation, including the lattice calculation, the matching to an infinite momentum and the nucleon mass correction. In addition, we test the effect of gauge link smearing in the operator to estimate the influence of the Wilson line renormalization, which is yet to be done.","authors_text":"Christian Wiese, Constantia Alexandrou, Elena Garcia-Ramos, Fernanda Steffens, Karl Jansen, Krzysztof Cichy, Kyriakos Hadjiyiannakou, Vincent Drach","cross_cats":["hep-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2015-04-28T12:53:25Z","title":"A Lattice Calculation of Parton Distributions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.07455","kind":"arxiv","version":3},"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":"sha256:4852f2a9bf79d90267fca794acda87f0107300fcaaa0b4db2b70d0e19bfa9574","target":"record","created_at":"2026-05-18T01:37:10Z","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":"e405593afb0550d0eb95328c2b134faf898e8a0429bfc1cb555f6de675f95e87","cross_cats_sorted":["hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2015-04-28T12:53:25Z","title_canon_sha256":"149353b09f36397b7d5d80b85560d60881348c0892301e47a60e9e8179836896"},"schema_version":"1.0","source":{"id":"1504.07455","kind":"arxiv","version":3}},"canonical_sha256":"c71670bfa2709727642e4b4e39882a7b08038ea8327fb2667505dcd1217de3cc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c71670bfa2709727642e4b4e39882a7b08038ea8327fb2667505dcd1217de3cc","first_computed_at":"2026-05-18T01:37:10.852912Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:37:10.852912Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Glea4gj/IJY1pUv/2fUYh0CsJLzYrK9l0e7PXQBb/EeZ64lTDCs9clOHT+GCE+pYQ1XJpSqRZ+mjnGJVMqaGAg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:37:10.853562Z","signed_message":"canonical_sha256_bytes"},"source_id":"1504.07455","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4852f2a9bf79d90267fca794acda87f0107300fcaaa0b4db2b70d0e19bfa9574","sha256:8a9e481b2fadead81ae66f7572017b9890c2661340219c9e06f0f4994e15ca8b"],"state_sha256":"4a925abcd76d2719b58a872be01365cef2d55410d5291389d018e1633092d2bd"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"g7zw5DuBkjjkHV2TWTHGtbiwFRiX9tD09nVS3gsVvKnKLFQU9VCMMime21pmkNLgj0EIxgIcQ9ZigwssxkqzCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T04:40:51.523076Z","bundle_sha256":"89377ebdc9b5e2200c80cd7a3ffe0269461130415ea4f7b725145ead1a72b3f5"}}