{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:JKXXRE64TVR5L722Z3EUWY4VJY","short_pith_number":"pith:JKXXRE64","canonical_record":{"source":{"id":"0902.4377","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2009-02-25T14:37:18Z","cross_cats_sorted":[],"title_canon_sha256":"ae13d6b831869075748be6935b9497fb394987c74c4b0bdb2e9d56a8d7d76aa2","abstract_canon_sha256":"beac520a3bad69afc2a89cd2ee11e629dbc462adeff8f24d4d8e3ae362e3d37b"},"schema_version":"1.0"},"canonical_sha256":"4aaf7893dc9d63d5ff5acec94b63954e0d7a50f429ea528bd0380ab0616a6e10","source":{"kind":"arxiv","id":"0902.4377","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0902.4377","created_at":"2026-05-18T02:35:00Z"},{"alias_kind":"arxiv_version","alias_value":"0902.4377v2","created_at":"2026-05-18T02:35:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0902.4377","created_at":"2026-05-18T02:35:00Z"},{"alias_kind":"pith_short_12","alias_value":"JKXXRE64TVR5","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"JKXXRE64TVR5L722","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"JKXXRE64","created_at":"2026-05-18T12:26:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:JKXXRE64TVR5L722Z3EUWY4VJY","target":"record","payload":{"canonical_record":{"source":{"id":"0902.4377","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2009-02-25T14:37:18Z","cross_cats_sorted":[],"title_canon_sha256":"ae13d6b831869075748be6935b9497fb394987c74c4b0bdb2e9d56a8d7d76aa2","abstract_canon_sha256":"beac520a3bad69afc2a89cd2ee11e629dbc462adeff8f24d4d8e3ae362e3d37b"},"schema_version":"1.0"},"canonical_sha256":"4aaf7893dc9d63d5ff5acec94b63954e0d7a50f429ea528bd0380ab0616a6e10","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:35:00.838040Z","signature_b64":"cnp1Yewqyf8FwBVIzuL+lH9CaZijyT0Wouef8NKBB2Vvln0Pak4XFZh7NUiO0SSxi/g//qY6Ws+ZGND1dQnnAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4aaf7893dc9d63d5ff5acec94b63954e0d7a50f429ea528bd0380ab0616a6e10","last_reissued_at":"2026-05-18T02:35:00.837613Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:35:00.837613Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0902.4377","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:35:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GfVWxFFjjkRE2mHFStf2yNjWHBViTKkeDxTdVonpNuEH3sak5c9nq43wKlGdtTzst67GntWKYFwdgpJWM5CkDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T13:21:24.313557Z"},"content_sha256":"f66a2db21351edbb344654122bfb2958a73beec66a92f6406b5e451674dddc0b","schema_version":"1.0","event_id":"sha256:f66a2db21351edbb344654122bfb2958a73beec66a92f6406b5e451674dddc0b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:JKXXRE64TVR5L722Z3EUWY4VJY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Measurement of charged pions in 12C + 12C collisions at 1A GeV and 2A GeV with HADES","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A.Balanda, A.Belyaev, A.Blanco, A.Bortolotti, A.Dybczak, A.Gil, A.Ierusalimov, A.Ivashkin, A.Kozuch, A.Krasa, A.Kugler, A.Kurepin, A.Mangiarotti, A.Reshetin, A.Rustamov, A.Sadovsky, A.Schmah, A.Tarantola, B.Kaempfer, B.Michalska, B.Ramstein, B.Sailer, B.Spruck, B.W.Kolb, C.Agodi, C.Gilardi, C.Maiolino, C.Muentz, C.Schroeder, C.Sturm, D.Belver, D.Gonzalez-Diaz, D.Kirschner, E.Grosse, E.Moriniere, E.Schwab, F.Dohrmann, F.Guber, F.Krizek, G.Bellia, H.Stroebele, H.Tsertos, I.Duran, I.Froehlich, I.Iori, I.Koenig, J.A.Garzon, J.Bielcik, J.Diaz, J.Friese, J.Lamas-Valverde, J.L.Boyard, J.Marin, J.Markert, J.Michel, J.Mousa, J.Otwinowski, J.Pietraszko, J.S.Lange, J.Stroth, J.Wuestenfeld, K.Kanaki, K.Lapidus, K.Teilab, L.Fabbietti, L.Lopes, L.Maier, L.Naumann, M.Destefanis, M.Golubeva, M.Heilmann, M.Jurkovic, M.Lorenz, M.Muench, M.Palka, M.Roy-Stephan, M.Sudol, M.Traxler, M.Weber, M.Wisniowski, O.Fateev, O.Pechenova, P.Braun-Munzinger, P.Cabanelas, P.Finocchiaro, P.Fonte, P.Piattelli, P.Salabura, P.Sapienza, P.Tlusty, P.Zhou, P.Zumbruch, R.Coniglione, R.Ferreira-Marques, R.Gernhaeuser, R.Holzmann, R.Kotte, R.Kruecken, R.Novotny, R.S.Simon, R.Trebacz, S.Chernenko, S.Lang, S.Spataro, S.Yurevich, T.Christ, T.Eberl, T.Galatyuk, The HADES Collaboration: G.Agakishiev, T.Heinz, T.Hennino, T.Karavicheva, T.Perez Cavalcanti, T.Wojcik, V.Metag, V.Pechenov, V.Pospisil, V.Wagner, W.Koenig, W.Kuehn, W.Przygoda, Y.C.Pachmayer, Y.Parpottas, Yu.G.Sobolev, Y.Zanevsky","submitted_at":"2009-02-25T14:37:18Z","abstract_excerpt":"We present the results of a study of charged pion production in 12C + 12C collisions at incident beam energies of 1A GeV and 2A GeV using the HADES spectrometer at GSI. The main emphasis of the HADES program is on the dielectron signal from the early phase of the collision. Here, however, we discuss the data with respect to the emission of charged hadrons, specifically the production of pi+- mesons, which are related to neutral pions representing a dominant contribution to the dielectron yield. We have performed the first large-angular range measurement of the distribution of pi+- mesons for t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0902.4377","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:35:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xe4vExvlyAleK4uoCEhADE41VeBUIyRC+GrZ+1iV2JNNF98aAWRtOhkrAqh+1mUcGWEmiRKKL4JxwzOTxsPVCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T13:21:24.313934Z"},"content_sha256":"cef8935557a38132accfc1d2da6135c4a1b2a0f4835b7702f50add4bd2da6e2a","schema_version":"1.0","event_id":"sha256:cef8935557a38132accfc1d2da6135c4a1b2a0f4835b7702f50add4bd2da6e2a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JKXXRE64TVR5L722Z3EUWY4VJY/bundle.json","state_url":"https://pith.science/pith/JKXXRE64TVR5L722Z3EUWY4VJY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JKXXRE64TVR5L722Z3EUWY4VJY/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":"2026-06-09T13:21:24Z","links":{"resolver":"https://pith.science/pith/JKXXRE64TVR5L722Z3EUWY4VJY","bundle":"https://pith.science/pith/JKXXRE64TVR5L722Z3EUWY4VJY/bundle.json","state":"https://pith.science/pith/JKXXRE64TVR5L722Z3EUWY4VJY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JKXXRE64TVR5L722Z3EUWY4VJY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:JKXXRE64TVR5L722Z3EUWY4VJY","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":"beac520a3bad69afc2a89cd2ee11e629dbc462adeff8f24d4d8e3ae362e3d37b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2009-02-25T14:37:18Z","title_canon_sha256":"ae13d6b831869075748be6935b9497fb394987c74c4b0bdb2e9d56a8d7d76aa2"},"schema_version":"1.0","source":{"id":"0902.4377","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0902.4377","created_at":"2026-05-18T02:35:00Z"},{"alias_kind":"arxiv_version","alias_value":"0902.4377v2","created_at":"2026-05-18T02:35:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0902.4377","created_at":"2026-05-18T02:35:00Z"},{"alias_kind":"pith_short_12","alias_value":"JKXXRE64TVR5","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"JKXXRE64TVR5L722","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"JKXXRE64","created_at":"2026-05-18T12:26:00Z"}],"graph_snapshots":[{"event_id":"sha256:cef8935557a38132accfc1d2da6135c4a1b2a0f4835b7702f50add4bd2da6e2a","target":"graph","created_at":"2026-05-18T02:35:00Z","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":"We present the results of a study of charged pion production in 12C + 12C collisions at incident beam energies of 1A GeV and 2A GeV using the HADES spectrometer at GSI. The main emphasis of the HADES program is on the dielectron signal from the early phase of the collision. Here, however, we discuss the data with respect to the emission of charged hadrons, specifically the production of pi+- mesons, which are related to neutral pions representing a dominant contribution to the dielectron yield. We have performed the first large-angular range measurement of the distribution of pi+- mesons for t","authors_text":"A.Balanda, A.Belyaev, A.Blanco, A.Bortolotti, A.Dybczak, A.Gil, A.Ierusalimov, A.Ivashkin, A.Kozuch, A.Krasa, A.Kugler, A.Kurepin, A.Mangiarotti, A.Reshetin, A.Rustamov, A.Sadovsky, A.Schmah, A.Tarantola, B.Kaempfer, B.Michalska, B.Ramstein, B.Sailer, B.Spruck, B.W.Kolb, C.Agodi, C.Gilardi, C.Maiolino, C.Muentz, C.Schroeder, C.Sturm, D.Belver, D.Gonzalez-Diaz, D.Kirschner, E.Grosse, E.Moriniere, E.Schwab, F.Dohrmann, F.Guber, F.Krizek, G.Bellia, H.Stroebele, H.Tsertos, I.Duran, I.Froehlich, I.Iori, I.Koenig, J.A.Garzon, J.Bielcik, J.Diaz, J.Friese, J.Lamas-Valverde, J.L.Boyard, J.Marin, J.Markert, J.Michel, J.Mousa, J.Otwinowski, J.Pietraszko, J.S.Lange, J.Stroth, J.Wuestenfeld, K.Kanaki, K.Lapidus, K.Teilab, L.Fabbietti, L.Lopes, L.Maier, L.Naumann, M.Destefanis, M.Golubeva, M.Heilmann, M.Jurkovic, M.Lorenz, M.Muench, M.Palka, M.Roy-Stephan, M.Sudol, M.Traxler, M.Weber, M.Wisniowski, O.Fateev, O.Pechenova, P.Braun-Munzinger, P.Cabanelas, P.Finocchiaro, P.Fonte, P.Piattelli, P.Salabura, P.Sapienza, P.Tlusty, P.Zhou, P.Zumbruch, R.Coniglione, R.Ferreira-Marques, R.Gernhaeuser, R.Holzmann, R.Kotte, R.Kruecken, R.Novotny, R.S.Simon, R.Trebacz, S.Chernenko, S.Lang, S.Spataro, S.Yurevich, T.Christ, T.Eberl, T.Galatyuk, The HADES Collaboration: G.Agakishiev, T.Heinz, T.Hennino, T.Karavicheva, T.Perez Cavalcanti, T.Wojcik, V.Metag, V.Pechenov, V.Pospisil, V.Wagner, W.Koenig, W.Kuehn, W.Przygoda, Y.C.Pachmayer, Y.Parpottas, Yu.G.Sobolev, Y.Zanevsky","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2009-02-25T14:37:18Z","title":"Measurement of charged pions in 12C + 12C collisions at 1A GeV and 2A GeV with HADES"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0902.4377","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:f66a2db21351edbb344654122bfb2958a73beec66a92f6406b5e451674dddc0b","target":"record","created_at":"2026-05-18T02:35:00Z","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":"beac520a3bad69afc2a89cd2ee11e629dbc462adeff8f24d4d8e3ae362e3d37b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2009-02-25T14:37:18Z","title_canon_sha256":"ae13d6b831869075748be6935b9497fb394987c74c4b0bdb2e9d56a8d7d76aa2"},"schema_version":"1.0","source":{"id":"0902.4377","kind":"arxiv","version":2}},"canonical_sha256":"4aaf7893dc9d63d5ff5acec94b63954e0d7a50f429ea528bd0380ab0616a6e10","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4aaf7893dc9d63d5ff5acec94b63954e0d7a50f429ea528bd0380ab0616a6e10","first_computed_at":"2026-05-18T02:35:00.837613Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:35:00.837613Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"cnp1Yewqyf8FwBVIzuL+lH9CaZijyT0Wouef8NKBB2Vvln0Pak4XFZh7NUiO0SSxi/g//qY6Ws+ZGND1dQnnAA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:35:00.838040Z","signed_message":"canonical_sha256_bytes"},"source_id":"0902.4377","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f66a2db21351edbb344654122bfb2958a73beec66a92f6406b5e451674dddc0b","sha256:cef8935557a38132accfc1d2da6135c4a1b2a0f4835b7702f50add4bd2da6e2a"],"state_sha256":"3fcc7cbe3787eee5894423a0800875b91c9be70963ac00fd574ead43a3095bfa"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ph8lm0cwHuwN/es1IskC/JXbtMXuynZGgyfiWjt1uePWdGJ6pP9fcVHmx2depmPR44rh0/gBTRlqXMYSN4xYBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T13:21:24.316222Z","bundle_sha256":"f6ef86e897f4b6a8024cb96c95c41f608a813600ab99e13b2953992a4a672d95"}}