{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:R2RUTK6EK2B55IX2VIT4NXGLJE","short_pith_number":"pith:R2RUTK6E","canonical_record":{"source":{"id":"2105.12624","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2021-05-26T15:25:37Z","cross_cats_sorted":[],"title_canon_sha256":"7837bfddfed293bcf9c29645e30f85d7cc4b10848bb044dd2a8bf4fe11d439a9","abstract_canon_sha256":"73c726eccba3fb9a63036b92856b9c0e8ab16bcd6ed632fccdf112c9c0291c5a"},"schema_version":"1.0"},"canonical_sha256":"8ea349abc45683dea2faaa27c6dccb4932035c78f78699ad6e1beffbeefd8563","source":{"kind":"arxiv","id":"2105.12624","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2105.12624","created_at":"2026-07-05T03:40:36Z"},{"alias_kind":"arxiv_version","alias_value":"2105.12624v4","created_at":"2026-07-05T03:40:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2105.12624","created_at":"2026-07-05T03:40:36Z"},{"alias_kind":"pith_short_12","alias_value":"R2RUTK6EK2B5","created_at":"2026-07-05T03:40:36Z"},{"alias_kind":"pith_short_16","alias_value":"R2RUTK6EK2B55IX2","created_at":"2026-07-05T03:40:36Z"},{"alias_kind":"pith_short_8","alias_value":"R2RUTK6E","created_at":"2026-07-05T03:40:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:R2RUTK6EK2B55IX2VIT4NXGLJE","target":"record","payload":{"canonical_record":{"source":{"id":"2105.12624","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2021-05-26T15:25:37Z","cross_cats_sorted":[],"title_canon_sha256":"7837bfddfed293bcf9c29645e30f85d7cc4b10848bb044dd2a8bf4fe11d439a9","abstract_canon_sha256":"73c726eccba3fb9a63036b92856b9c0e8ab16bcd6ed632fccdf112c9c0291c5a"},"schema_version":"1.0"},"canonical_sha256":"8ea349abc45683dea2faaa27c6dccb4932035c78f78699ad6e1beffbeefd8563","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:40:36.779340Z","signature_b64":"eHtat9b5kAIO273OC7FY1qWSETt6yMTYG8AdNoEdwPlGAK/q/FPF2R07roHe2I8H4NDZNSpI64AkTyV5hPG0Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8ea349abc45683dea2faaa27c6dccb4932035c78f78699ad6e1beffbeefd8563","last_reissued_at":"2026-07-05T03:40:36.778819Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:40:36.778819Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2105.12624","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:40:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PE1llj2BaOYY6YgqwhYE0sfXDh1pJHuvAH4OnTmXdcsrQyNIlRYULYomtgrfnp48LPL85lvXipA/jzGaGJl/Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T16:23:53.134362Z"},"content_sha256":"1507bd38f93c5269418d22805d840f1f528b31e8b8d89360333b05bfb74e167c","schema_version":"1.0","event_id":"sha256:1507bd38f93c5269418d22805d840f1f528b31e8b8d89360333b05bfb74e167c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:R2RUTK6EK2B55IX2VIT4NXGLJE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Muon detection in electron-positron annihilation for muon collider studies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.ins-det","authors_text":"A. Bertolin, A. Cappati, A. Paccagnella, A. Triossi, B. Kiani, B. Ponzio, C. Biino, C. Brizzolari, C. Curatolo, D. Lucchesi, E. Vallazza, F. Anulli, F. Casaburo, F. Collamati, F. Gonella, F. Iacoangeli, G. Ballerini, G. Cavoto, G. Cesarini, G. Cotto, J. Pazzini, L. Bandiera, L. Sestini, M. Antonelli, M. Bauce, M. Boscolo, M. Casarsa, M. Iafrati, M. Pelliccioni, M. Prest, M. Ricci, M. Rotondo, M. Soldani, M. Zanetti, N. Amapane, N.Bartosik, N. Pastrone, O. R. Blanco- Garcia, O. Sans Planell, R. Di Nardo, R. Li Voti, R. Rossin, S. Hoh, S. Rosati, S. Ventura, V. Mascagna","submitted_at":"2021-05-26T15:25:37Z","abstract_excerpt":"The investigation of the energy frontier in physics requires novel concepts for future colliders. The idea of a muon collider is very appealing since it would allow to study particle collisions at up to tens of TeV energy, while offering a cleaner experimental environment with respect to hadronic colliders. One key element in the muon collider design is the low-emittance muon production. Recently,the Low EMittance Muon Accelerator (LEMMA) collaboration has explored the muon pair production close to its kinematic threshold by annihilating 45 GeV positrons with electrons in a low Z material targ"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2105.12624","kind":"arxiv","version":4},"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/2105.12624/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":"2026-07-05T03:40:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0was2CuPqiCChZ/nJpBSkfVaVANUTYerHR2yC/+85XINIhX38fuBVeL6iNbOR0vbaMmLlqxcG0biGQPJVlTvBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T16:23:53.134884Z"},"content_sha256":"523b6fd37ba8770d878dc0d1d8b44e326d2054c45597ef6a350d9e8efe8544df","schema_version":"1.0","event_id":"sha256:523b6fd37ba8770d878dc0d1d8b44e326d2054c45597ef6a350d9e8efe8544df"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/R2RUTK6EK2B55IX2VIT4NXGLJE/bundle.json","state_url":"https://pith.science/pith/R2RUTK6EK2B55IX2VIT4NXGLJE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/R2RUTK6EK2B55IX2VIT4NXGLJE/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":"2026-08-14T16:23:53Z","links":{"resolver":"https://pith.science/pith/R2RUTK6EK2B55IX2VIT4NXGLJE","bundle":"https://pith.science/pith/R2RUTK6EK2B55IX2VIT4NXGLJE/bundle.json","state":"https://pith.science/pith/R2RUTK6EK2B55IX2VIT4NXGLJE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/R2RUTK6EK2B55IX2VIT4NXGLJE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:R2RUTK6EK2B55IX2VIT4NXGLJE","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":"73c726eccba3fb9a63036b92856b9c0e8ab16bcd6ed632fccdf112c9c0291c5a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2021-05-26T15:25:37Z","title_canon_sha256":"7837bfddfed293bcf9c29645e30f85d7cc4b10848bb044dd2a8bf4fe11d439a9"},"schema_version":"1.0","source":{"id":"2105.12624","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2105.12624","created_at":"2026-07-05T03:40:36Z"},{"alias_kind":"arxiv_version","alias_value":"2105.12624v4","created_at":"2026-07-05T03:40:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2105.12624","created_at":"2026-07-05T03:40:36Z"},{"alias_kind":"pith_short_12","alias_value":"R2RUTK6EK2B5","created_at":"2026-07-05T03:40:36Z"},{"alias_kind":"pith_short_16","alias_value":"R2RUTK6EK2B55IX2","created_at":"2026-07-05T03:40:36Z"},{"alias_kind":"pith_short_8","alias_value":"R2RUTK6E","created_at":"2026-07-05T03:40:36Z"}],"graph_snapshots":[{"event_id":"sha256:523b6fd37ba8770d878dc0d1d8b44e326d2054c45597ef6a350d9e8efe8544df","target":"graph","created_at":"2026-07-05T03:40:36Z","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/2105.12624/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The investigation of the energy frontier in physics requires novel concepts for future colliders. The idea of a muon collider is very appealing since it would allow to study particle collisions at up to tens of TeV energy, while offering a cleaner experimental environment with respect to hadronic colliders. One key element in the muon collider design is the low-emittance muon production. Recently,the Low EMittance Muon Accelerator (LEMMA) collaboration has explored the muon pair production close to its kinematic threshold by annihilating 45 GeV positrons with electrons in a low Z material targ","authors_text":"A. Bertolin, A. Cappati, A. Paccagnella, A. Triossi, B. Kiani, B. Ponzio, C. Biino, C. Brizzolari, C. Curatolo, D. Lucchesi, E. Vallazza, F. Anulli, F. Casaburo, F. Collamati, F. Gonella, F. Iacoangeli, G. Ballerini, G. Cavoto, G. Cesarini, G. Cotto, J. Pazzini, L. Bandiera, L. Sestini, M. Antonelli, M. Bauce, M. Boscolo, M. Casarsa, M. Iafrati, M. Pelliccioni, M. Prest, M. Ricci, M. Rotondo, M. Soldani, M. Zanetti, N. Amapane, N.Bartosik, N. Pastrone, O. R. Blanco- Garcia, O. Sans Planell, R. Di Nardo, R. Li Voti, R. Rossin, S. Hoh, S. Rosati, S. Ventura, V. Mascagna","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2021-05-26T15:25:37Z","title":"Muon detection in electron-positron annihilation for muon collider studies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2105.12624","kind":"arxiv","version":4},"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":"sha256:1507bd38f93c5269418d22805d840f1f528b31e8b8d89360333b05bfb74e167c","target":"record","created_at":"2026-07-05T03:40:36Z","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":"73c726eccba3fb9a63036b92856b9c0e8ab16bcd6ed632fccdf112c9c0291c5a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2021-05-26T15:25:37Z","title_canon_sha256":"7837bfddfed293bcf9c29645e30f85d7cc4b10848bb044dd2a8bf4fe11d439a9"},"schema_version":"1.0","source":{"id":"2105.12624","kind":"arxiv","version":4}},"canonical_sha256":"8ea349abc45683dea2faaa27c6dccb4932035c78f78699ad6e1beffbeefd8563","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8ea349abc45683dea2faaa27c6dccb4932035c78f78699ad6e1beffbeefd8563","first_computed_at":"2026-07-05T03:40:36.778819Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:40:36.778819Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eHtat9b5kAIO273OC7FY1qWSETt6yMTYG8AdNoEdwPlGAK/q/FPF2R07roHe2I8H4NDZNSpI64AkTyV5hPG0Dw==","signature_status":"signed_v1","signed_at":"2026-07-05T03:40:36.779340Z","signed_message":"canonical_sha256_bytes"},"source_id":"2105.12624","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1507bd38f93c5269418d22805d840f1f528b31e8b8d89360333b05bfb74e167c","sha256:523b6fd37ba8770d878dc0d1d8b44e326d2054c45597ef6a350d9e8efe8544df"],"state_sha256":"426596f11806a8b5b6ab88d81ba4f0922dfdfe358f992d11208b3c759b3167d0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"z9pVLe4wp9S8EBThZ7pTvBCfGhVinTQe0QrtFdz+7LYbWAyt+0q5ai8V/PA9rgpwdeJ6wR3nD9r3fPWMq4+OBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-14T16:23:53.150760Z","bundle_sha256":"a6fd8f694beed3febbdce0db914c1bff3b34c3bc92c8224042c3449d3bb1d5fc"}}