{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:NLD7HPCX3Y3SVNSVLCD57TN4RP","short_pith_number":"pith:NLD7HPCX","canonical_record":{"source":{"id":"1505.03586","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-05-14T00:58:37Z","cross_cats_sorted":["hep-ex","nucl-ex"],"title_canon_sha256":"b2f60ce6a7960cbe035c3dfe68b7862eeed1aa629baaffb25d4b5e36afb60677","abstract_canon_sha256":"9f160d53c55c1c719ab5ea3b0bd71fc68107787ee8c17dfcdee00bfd10f071c7"},"schema_version":"1.0"},"canonical_sha256":"6ac7f3bc57de372ab6555887dfcdbc8bd97be6b78c1521bf3c4c066d87ff3e39","source":{"kind":"arxiv","id":"1505.03586","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.03586","created_at":"2026-05-18T01:25:00Z"},{"alias_kind":"arxiv_version","alias_value":"1505.03586v1","created_at":"2026-05-18T01:25:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.03586","created_at":"2026-05-18T01:25:00Z"},{"alias_kind":"pith_short_12","alias_value":"NLD7HPCX3Y3S","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_16","alias_value":"NLD7HPCX3Y3SVNSV","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_8","alias_value":"NLD7HPCX","created_at":"2026-05-18T12:29:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:NLD7HPCX3Y3SVNSVLCD57TN4RP","target":"record","payload":{"canonical_record":{"source":{"id":"1505.03586","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-05-14T00:58:37Z","cross_cats_sorted":["hep-ex","nucl-ex"],"title_canon_sha256":"b2f60ce6a7960cbe035c3dfe68b7862eeed1aa629baaffb25d4b5e36afb60677","abstract_canon_sha256":"9f160d53c55c1c719ab5ea3b0bd71fc68107787ee8c17dfcdee00bfd10f071c7"},"schema_version":"1.0"},"canonical_sha256":"6ac7f3bc57de372ab6555887dfcdbc8bd97be6b78c1521bf3c4c066d87ff3e39","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:25:00.461882Z","signature_b64":"D9Yu5GCllOnDmdvlgSfXILbRJvEM6vY8EfGOdJawgsK+0mrVIJmUkHtGNxszdYzA5aN+pz4WUrVdnvF05EuXDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6ac7f3bc57de372ab6555887dfcdbc8bd97be6b78c1521bf3c4c066d87ff3e39","last_reissued_at":"2026-05-18T01:25:00.461210Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:25:00.461210Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1505.03586","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":"2026-05-18T01:25:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eg4iZ/UaYA2j829lQux2kYgIFT+YWBFllQlmbv2savJ3sOTavhYHhae4kOqHcAfFPIGwIasw2vTBAxzg7khyCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T00:28:00.563152Z"},"content_sha256":"92ba59520462e98c648c464d8af36523d762d9daeb7a1b306504a6f35804bca3","schema_version":"1.0","event_id":"sha256:92ba59520462e98c648c464d8af36523d762d9daeb7a1b306504a6f35804bca3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:NLD7HPCX3Y3SVNSVLCD57TN4RP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Micro-physics simulations of columnar recombination along nuclear recoil tracks in high-pressure Xe gas for directional dark matter searches","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex","nucl-ex"],"primary_cat":"physics.ins-det","authors_text":"A. Goldschmidt, C. Oliveira, D. Nygren, J. Renner, M. Long, Y. Nakajima","submitted_at":"2015-05-14T00:58:37Z","abstract_excerpt":"Directional sensitivity is one of the most important aspects of WIMP dark matter searches. Yet, making the direction of nuclear recoil visible with large target masses is a challenge. To achieve this, we are exploring a new method of detecting directions of short nuclear recoil tracks in high-pressure Xe gas, down to a few micron long, by utilizing columnar recombination. Columnar recombination changes the scintillation and ionization yields depending on the angle between a track and the electric field direction. In order to realize this, efficient cooling of electrons is essential. Trimethyla"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.03586","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":"2026-05-18T01:25:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"326xM3bhYpZTvp+p9kua96V+4wUzKVW5GMXb+9ZdPHJdUQyFxbp9VhR4AJZImaNXGX5LAPKs0SoNdM3LSRqNDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T00:28:00.563876Z"},"content_sha256":"fc8686b2bc507d4ababeaf4df9a39a6435a16edb0b5704070719fbb5d6d93f30","schema_version":"1.0","event_id":"sha256:fc8686b2bc507d4ababeaf4df9a39a6435a16edb0b5704070719fbb5d6d93f30"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NLD7HPCX3Y3SVNSVLCD57TN4RP/bundle.json","state_url":"https://pith.science/pith/NLD7HPCX3Y3SVNSVLCD57TN4RP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NLD7HPCX3Y3SVNSVLCD57TN4RP/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":"2026-05-31T00:28:00Z","links":{"resolver":"https://pith.science/pith/NLD7HPCX3Y3SVNSVLCD57TN4RP","bundle":"https://pith.science/pith/NLD7HPCX3Y3SVNSVLCD57TN4RP/bundle.json","state":"https://pith.science/pith/NLD7HPCX3Y3SVNSVLCD57TN4RP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NLD7HPCX3Y3SVNSVLCD57TN4RP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:NLD7HPCX3Y3SVNSVLCD57TN4RP","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":"9f160d53c55c1c719ab5ea3b0bd71fc68107787ee8c17dfcdee00bfd10f071c7","cross_cats_sorted":["hep-ex","nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-05-14T00:58:37Z","title_canon_sha256":"b2f60ce6a7960cbe035c3dfe68b7862eeed1aa629baaffb25d4b5e36afb60677"},"schema_version":"1.0","source":{"id":"1505.03586","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.03586","created_at":"2026-05-18T01:25:00Z"},{"alias_kind":"arxiv_version","alias_value":"1505.03586v1","created_at":"2026-05-18T01:25:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.03586","created_at":"2026-05-18T01:25:00Z"},{"alias_kind":"pith_short_12","alias_value":"NLD7HPCX3Y3S","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_16","alias_value":"NLD7HPCX3Y3SVNSV","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_8","alias_value":"NLD7HPCX","created_at":"2026-05-18T12:29:32Z"}],"graph_snapshots":[{"event_id":"sha256:fc8686b2bc507d4ababeaf4df9a39a6435a16edb0b5704070719fbb5d6d93f30","target":"graph","created_at":"2026-05-18T01:25:00Z","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":"Directional sensitivity is one of the most important aspects of WIMP dark matter searches. Yet, making the direction of nuclear recoil visible with large target masses is a challenge. To achieve this, we are exploring a new method of detecting directions of short nuclear recoil tracks in high-pressure Xe gas, down to a few micron long, by utilizing columnar recombination. Columnar recombination changes the scintillation and ionization yields depending on the angle between a track and the electric field direction. In order to realize this, efficient cooling of electrons is essential. Trimethyla","authors_text":"A. Goldschmidt, C. Oliveira, D. Nygren, J. Renner, M. Long, Y. Nakajima","cross_cats":["hep-ex","nucl-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-05-14T00:58:37Z","title":"Micro-physics simulations of columnar recombination along nuclear recoil tracks in high-pressure Xe gas for directional dark matter searches"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.03586","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":"sha256:92ba59520462e98c648c464d8af36523d762d9daeb7a1b306504a6f35804bca3","target":"record","created_at":"2026-05-18T01:25:00Z","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":"9f160d53c55c1c719ab5ea3b0bd71fc68107787ee8c17dfcdee00bfd10f071c7","cross_cats_sorted":["hep-ex","nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-05-14T00:58:37Z","title_canon_sha256":"b2f60ce6a7960cbe035c3dfe68b7862eeed1aa629baaffb25d4b5e36afb60677"},"schema_version":"1.0","source":{"id":"1505.03586","kind":"arxiv","version":1}},"canonical_sha256":"6ac7f3bc57de372ab6555887dfcdbc8bd97be6b78c1521bf3c4c066d87ff3e39","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6ac7f3bc57de372ab6555887dfcdbc8bd97be6b78c1521bf3c4c066d87ff3e39","first_computed_at":"2026-05-18T01:25:00.461210Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:25:00.461210Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"D9Yu5GCllOnDmdvlgSfXILbRJvEM6vY8EfGOdJawgsK+0mrVIJmUkHtGNxszdYzA5aN+pz4WUrVdnvF05EuXDw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:25:00.461882Z","signed_message":"canonical_sha256_bytes"},"source_id":"1505.03586","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:92ba59520462e98c648c464d8af36523d762d9daeb7a1b306504a6f35804bca3","sha256:fc8686b2bc507d4ababeaf4df9a39a6435a16edb0b5704070719fbb5d6d93f30"],"state_sha256":"7ea690942dc746b9efbdef0c401fc3b0f5e3f34b4b60559e4dc61f260db3bb30"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+ZvMiwj4BgaP0RmZiAoAfPnaMUkQPYDxe8VLJ2R0oVsROc7kH7GWJuldT52mU1WDOAKMqEoU1PA2RiAADYItDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T00:28:00.567087Z","bundle_sha256":"2944a3b64caa0d1ccc8197aafa69df5a62ca2f2de1f127309e8b5b154802f149"}}