{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:ZBVSWZTJCODR6YRJC27MCXGXMA","short_pith_number":"pith:ZBVSWZTJ","canonical_record":{"source":{"id":"2310.08760","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2023-10-12T23:00:01Z","cross_cats_sorted":["hep-ex"],"title_canon_sha256":"74076cc6b3fb3f77e71c3786f80b9bcfacd8ca9e12414ab5554999555bc5765a","abstract_canon_sha256":"847cb0e259c8c35625c0bd4ec5a12ad58a2bce370165fd91be09a6d2a32274e7"},"schema_version":"1.0"},"canonical_sha256":"c86b2b666913871f622916bec15cd7603d91c839fa563edd1ce87de8d532356c","source":{"kind":"arxiv","id":"2310.08760","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2310.08760","created_at":"2026-07-05T07:00:34Z"},{"alias_kind":"arxiv_version","alias_value":"2310.08760v1","created_at":"2026-07-05T07:00:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2310.08760","created_at":"2026-07-05T07:00:34Z"},{"alias_kind":"pith_short_12","alias_value":"ZBVSWZTJCODR","created_at":"2026-07-05T07:00:34Z"},{"alias_kind":"pith_short_16","alias_value":"ZBVSWZTJCODR6YRJ","created_at":"2026-07-05T07:00:34Z"},{"alias_kind":"pith_short_8","alias_value":"ZBVSWZTJ","created_at":"2026-07-05T07:00:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:ZBVSWZTJCODR6YRJC27MCXGXMA","target":"record","payload":{"canonical_record":{"source":{"id":"2310.08760","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2023-10-12T23:00:01Z","cross_cats_sorted":["hep-ex"],"title_canon_sha256":"74076cc6b3fb3f77e71c3786f80b9bcfacd8ca9e12414ab5554999555bc5765a","abstract_canon_sha256":"847cb0e259c8c35625c0bd4ec5a12ad58a2bce370165fd91be09a6d2a32274e7"},"schema_version":"1.0"},"canonical_sha256":"c86b2b666913871f622916bec15cd7603d91c839fa563edd1ce87de8d532356c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T07:00:34.624987Z","signature_b64":"ayd4KjsohdHrpqsRm1pVPYkP7HZzvryaVLsLWrZ04ndJd1aY7GRU9zqZLFKyW5G1T0Vvc2bBTnj3csJ7zlrKDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c86b2b666913871f622916bec15cd7603d91c839fa563edd1ce87de8d532356c","last_reissued_at":"2026-07-05T07:00:34.624577Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T07:00:34.624577Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2310.08760","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":"2026-07-05T07:00:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lDuFTvIicbN4MN9VlGcfoMytfZzi3I32WrODyLypEcGVXdfE87y0yAl5DacWR5f2ZldWQrjYvsULaBJEQ5apCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-08T15:44:02.464025Z"},"content_sha256":"1bfe289863fc57527d78e59fe58c266ed8ea7df932be3a1b4c48b5585bade60b","schema_version":"1.0","event_id":"sha256:1bfe289863fc57527d78e59fe58c266ed8ea7df932be3a1b4c48b5585bade60b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:ZBVSWZTJCODR6YRJC27MCXGXMA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Positronium laser cooling via the $1^3S$-$2^3P$ transition with a broadband laser pulse","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"physics.atom-ph","authors_text":"A. Camper, A. Linek, B. Bergmann, B. Rien\\\"acker, B. S. Rawat, C. P. Welsch, D. Comparat, D. Tefelski, F. Castelli, F. Guatieri, F. Gustafsson, F. Prelz, G. Consolati, G. Kasprowicz, G. Khatri, G. Kornakov, H. Sandaker, J. Malamant, J. Zielinski, \\L. Graczykowski, {\\L}.K{\\l}osowski, L. Lappo, L. Penasa, L. Povolo, L. T. Gl\\\"oggler, M. A. Janik, M. Auzins, M. Doser, M. Grosbart, M. Piwi\\'nski, M. Volponi, M. Zawada, N. Gusakova, N. Zurlo, O. M. R{\\o}hne, P. Burian, P. Smolyanskiy, R. Caravita, R. Ciury{\\l}o, R. S. Brusa, S. A. Rangwala, S. Haider, S. Huck, S. Mariazzi, S. Pospisil, T. Rauschendorfer, T. Sowi\\'nski, T. Vafeiadis, T. Wolz, V. Krumins, V. Petracek, V. Rodin","submitted_at":"2023-10-12T23:00:01Z","abstract_excerpt":"We report on laser cooling of a large fraction of positronium (Ps) in free-flight by strongly saturating the $1^3S$-$2^3P$ transition with a broadband, long-pulsed 243 nm alexandrite laser. The ground state Ps cloud is produced in a magnetic and electric field-free environment. We observe two different laser-induced effects. The first effect is an increase in the number of atoms in the ground state after the time Ps has spent in the long-lived $3^3P$ states. The second effect is the one-dimensional Doppler cooling of Ps, reducing the cloud's temperature from 380(20) K to 170(20) K. We demonstr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2310.08760","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2310.08760/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T07:00:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"26DjyadNwPkb8/eHFBmyue4T6Kt4leS3GHxvSl9mJmVriADBKYsTIGitHo3ikb7Z0nJ7Je9vDmfngodZZvDEBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-08T15:44:02.464432Z"},"content_sha256":"00ed65438d65e0abc26cc337ebe36a034222d8362e23b1386fe02cfc3983df55","schema_version":"1.0","event_id":"sha256:00ed65438d65e0abc26cc337ebe36a034222d8362e23b1386fe02cfc3983df55"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZBVSWZTJCODR6YRJC27MCXGXMA/bundle.json","state_url":"https://pith.science/pith/ZBVSWZTJCODR6YRJC27MCXGXMA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZBVSWZTJCODR6YRJC27MCXGXMA/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":"2026-07-08T15:44:02Z","links":{"resolver":"https://pith.science/pith/ZBVSWZTJCODR6YRJC27MCXGXMA","bundle":"https://pith.science/pith/ZBVSWZTJCODR6YRJC27MCXGXMA/bundle.json","state":"https://pith.science/pith/ZBVSWZTJCODR6YRJC27MCXGXMA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZBVSWZTJCODR6YRJC27MCXGXMA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:ZBVSWZTJCODR6YRJC27MCXGXMA","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":"847cb0e259c8c35625c0bd4ec5a12ad58a2bce370165fd91be09a6d2a32274e7","cross_cats_sorted":["hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2023-10-12T23:00:01Z","title_canon_sha256":"74076cc6b3fb3f77e71c3786f80b9bcfacd8ca9e12414ab5554999555bc5765a"},"schema_version":"1.0","source":{"id":"2310.08760","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2310.08760","created_at":"2026-07-05T07:00:34Z"},{"alias_kind":"arxiv_version","alias_value":"2310.08760v1","created_at":"2026-07-05T07:00:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2310.08760","created_at":"2026-07-05T07:00:34Z"},{"alias_kind":"pith_short_12","alias_value":"ZBVSWZTJCODR","created_at":"2026-07-05T07:00:34Z"},{"alias_kind":"pith_short_16","alias_value":"ZBVSWZTJCODR6YRJ","created_at":"2026-07-05T07:00:34Z"},{"alias_kind":"pith_short_8","alias_value":"ZBVSWZTJ","created_at":"2026-07-05T07:00:34Z"}],"graph_snapshots":[{"event_id":"sha256:00ed65438d65e0abc26cc337ebe36a034222d8362e23b1386fe02cfc3983df55","target":"graph","created_at":"2026-07-05T07:00:34Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2310.08760/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We report on laser cooling of a large fraction of positronium (Ps) in free-flight by strongly saturating the $1^3S$-$2^3P$ transition with a broadband, long-pulsed 243 nm alexandrite laser. The ground state Ps cloud is produced in a magnetic and electric field-free environment. We observe two different laser-induced effects. The first effect is an increase in the number of atoms in the ground state after the time Ps has spent in the long-lived $3^3P$ states. The second effect is the one-dimensional Doppler cooling of Ps, reducing the cloud's temperature from 380(20) K to 170(20) K. We demonstr","authors_text":"A. Camper, A. Linek, B. Bergmann, B. Rien\\\"acker, B. S. Rawat, C. P. Welsch, D. Comparat, D. Tefelski, F. Castelli, F. Guatieri, F. Gustafsson, F. Prelz, G. Consolati, G. Kasprowicz, G. Khatri, G. Kornakov, H. Sandaker, J. Malamant, J. Zielinski, \\L. Graczykowski, {\\L}.K{\\l}osowski, L. Lappo, L. Penasa, L. Povolo, L. T. Gl\\\"oggler, M. A. Janik, M. Auzins, M. Doser, M. Grosbart, M. Piwi\\'nski, M. Volponi, M. Zawada, N. Gusakova, N. Zurlo, O. M. R{\\o}hne, P. Burian, P. Smolyanskiy, R. Caravita, R. Ciury{\\l}o, R. S. Brusa, S. A. Rangwala, S. Haider, S. Huck, S. Mariazzi, S. Pospisil, T. Rauschendorfer, T. Sowi\\'nski, T. Vafeiadis, T. Wolz, V. Krumins, V. Petracek, V. Rodin","cross_cats":["hep-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2023-10-12T23:00:01Z","title":"Positronium laser cooling via the $1^3S$-$2^3P$ transition with a broadband laser pulse"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2310.08760","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":"sha256:1bfe289863fc57527d78e59fe58c266ed8ea7df932be3a1b4c48b5585bade60b","target":"record","created_at":"2026-07-05T07:00:34Z","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":"847cb0e259c8c35625c0bd4ec5a12ad58a2bce370165fd91be09a6d2a32274e7","cross_cats_sorted":["hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2023-10-12T23:00:01Z","title_canon_sha256":"74076cc6b3fb3f77e71c3786f80b9bcfacd8ca9e12414ab5554999555bc5765a"},"schema_version":"1.0","source":{"id":"2310.08760","kind":"arxiv","version":1}},"canonical_sha256":"c86b2b666913871f622916bec15cd7603d91c839fa563edd1ce87de8d532356c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c86b2b666913871f622916bec15cd7603d91c839fa563edd1ce87de8d532356c","first_computed_at":"2026-07-05T07:00:34.624577Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T07:00:34.624577Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ayd4KjsohdHrpqsRm1pVPYkP7HZzvryaVLsLWrZ04ndJd1aY7GRU9zqZLFKyW5G1T0Vvc2bBTnj3csJ7zlrKDw==","signature_status":"signed_v1","signed_at":"2026-07-05T07:00:34.624987Z","signed_message":"canonical_sha256_bytes"},"source_id":"2310.08760","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1bfe289863fc57527d78e59fe58c266ed8ea7df932be3a1b4c48b5585bade60b","sha256:00ed65438d65e0abc26cc337ebe36a034222d8362e23b1386fe02cfc3983df55"],"state_sha256":"289679285c76cae442f927dc5350d83ea184a38493f90c8892fba89d0339a49d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"x+BxS1ctXZOj6qiGtqNRu4haBOStMWApcVlYzlsF2+Y6OZZe4tA9/QyEuuSSTP2RzZ934fCqRxiX/ng6J6ObBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-08T15:44:02.466714Z","bundle_sha256":"1d82dda5fe44ddc20247ee8229ae29a1f159a01a5740f2a6cc4d9ff23e483ce7"}}