{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2016:273D2NCFDGRPIYKTC35ZPPE5K6","short_pith_number":"pith:273D2NCF","schema_version":"1.0","canonical_sha256":"d7f63d344519a2f4615316fb97bc9d57aab8a4d786c1e58145b2feb10f4f0d96","source":{"kind":"arxiv","id":"1612.06436","version":2},"attestation_state":"computed","paper":{"title":"Equilibration and freeze-out of an expanding gas in a transport approach in a Friedmann-Robertson-Walker metric","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-th"],"primary_cat":"hep-ph","authors_text":"H. Petersen, J.B. Rose, J.M. Torres-Rincon, J. Tindall","submitted_at":"2016-12-19T22:06:18Z","abstract_excerpt":"Motivated by a recent finding of an exact solution of the relativistic Boltzmann equation in a Friedmann-Robertson-Walker spacetime, we implement this metric into the newly developed transport approach Simulating Many Accelerated Strongly-interacting Hadrons (SMASH). We study the numerical solution of the transport equation and compare it to this exact solution for massless particles. We also compare a different initial condition, for which the transport equation can be independently solved numerically. Very nice agreement is observed in both cases. Having passed these checks for the SMASH cod"},"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":"1612.06436","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2016-12-19T22:06:18Z","cross_cats_sorted":["nucl-th"],"title_canon_sha256":"3be4bbe0ef95c68164a1b97b7f79bffaa3d2cd4603efde50c1cb37096b32db64","abstract_canon_sha256":"bf460975cafa9f46cee66d2d76e9eb27d7d477ff51111e3af778c99892143dab"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:42:46.309512Z","signature_b64":"vkn4KM230Oq5eo+8dFSdNGosSXkMd9fykiiMJi0e9YgqYjNsXIwvVXZ2Rm5uN8OeaiUt0PmsWSDZw6xFpmvYAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d7f63d344519a2f4615316fb97bc9d57aab8a4d786c1e58145b2feb10f4f0d96","last_reissued_at":"2026-05-18T00:42:46.308846Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:42:46.308846Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Equilibration and freeze-out of an expanding gas in a transport approach in a Friedmann-Robertson-Walker metric","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-th"],"primary_cat":"hep-ph","authors_text":"H. Petersen, J.B. Rose, J.M. Torres-Rincon, J. Tindall","submitted_at":"2016-12-19T22:06:18Z","abstract_excerpt":"Motivated by a recent finding of an exact solution of the relativistic Boltzmann equation in a Friedmann-Robertson-Walker spacetime, we implement this metric into the newly developed transport approach Simulating Many Accelerated Strongly-interacting Hadrons (SMASH). We study the numerical solution of the transport equation and compare it to this exact solution for massless particles. We also compare a different initial condition, for which the transport equation can be independently solved numerically. Very nice agreement is observed in both cases. Having passed these checks for the SMASH cod"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.06436","kind":"arxiv","version":2},"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":"1612.06436","created_at":"2026-05-18T00:42:46.308969+00:00"},{"alias_kind":"arxiv_version","alias_value":"1612.06436v2","created_at":"2026-05-18T00:42:46.308969+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1612.06436","created_at":"2026-05-18T00:42:46.308969+00:00"},{"alias_kind":"pith_short_12","alias_value":"273D2NCFDGRP","created_at":"2026-05-18T12:29:52.810259+00:00"},{"alias_kind":"pith_short_16","alias_value":"273D2NCFDGRPIYKT","created_at":"2026-05-18T12:29:52.810259+00:00"},{"alias_kind":"pith_short_8","alias_value":"273D2NCF","created_at":"2026-05-18T12:29:52.810259+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2512.06257","citing_title":"Maximally Symmetric Boost-Invariant Solutions of the Boltzmann Equation in Foliated Geometries","ref_index":14,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/273D2NCFDGRPIYKTC35ZPPE5K6","json":"https://pith.science/pith/273D2NCFDGRPIYKTC35ZPPE5K6.json","graph_json":"https://pith.science/api/pith-number/273D2NCFDGRPIYKTC35ZPPE5K6/graph.json","events_json":"https://pith.science/api/pith-number/273D2NCFDGRPIYKTC35ZPPE5K6/events.json","paper":"https://pith.science/paper/273D2NCF"},"agent_actions":{"view_html":"https://pith.science/pith/273D2NCFDGRPIYKTC35ZPPE5K6","download_json":"https://pith.science/pith/273D2NCFDGRPIYKTC35ZPPE5K6.json","view_paper":"https://pith.science/paper/273D2NCF","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1612.06436&json=true","fetch_graph":"https://pith.science/api/pith-number/273D2NCFDGRPIYKTC35ZPPE5K6/graph.json","fetch_events":"https://pith.science/api/pith-number/273D2NCFDGRPIYKTC35ZPPE5K6/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/273D2NCFDGRPIYKTC35ZPPE5K6/action/timestamp_anchor","attest_storage":"https://pith.science/pith/273D2NCFDGRPIYKTC35ZPPE5K6/action/storage_attestation","attest_author":"https://pith.science/pith/273D2NCFDGRPIYKTC35ZPPE5K6/action/author_attestation","sign_citation":"https://pith.science/pith/273D2NCFDGRPIYKTC35ZPPE5K6/action/citation_signature","submit_replication":"https://pith.science/pith/273D2NCFDGRPIYKTC35ZPPE5K6/action/replication_record"}},"created_at":"2026-05-18T00:42:46.308969+00:00","updated_at":"2026-05-18T00:42:46.308969+00:00"}