{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:5B5HG2H7BPUCUTV7RBTU2IGYNT","short_pith_number":"pith:5B5HG2H7","canonical_record":{"source":{"id":"2006.05045","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2020-06-09T04:45:30Z","cross_cats_sorted":[],"title_canon_sha256":"ead26be8ac7318bb3a7d678d9c59e29211fa4eb8353df91b438aac29e42fd942","abstract_canon_sha256":"499c7e3d4d1e0edd6ddb8e86a76d4042094bdca8ae5913025f201fd09362ea52"},"schema_version":"1.0"},"canonical_sha256":"e87a7368ff0be82a4ebf88674d20d86ce77915c808a2bc156d63eca9b88c03a1","source":{"kind":"arxiv","id":"2006.05045","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2006.05045","created_at":"2026-07-05T01:46:21Z"},{"alias_kind":"arxiv_version","alias_value":"2006.05045v2","created_at":"2026-07-05T01:46:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2006.05045","created_at":"2026-07-05T01:46:21Z"},{"alias_kind":"pith_short_12","alias_value":"5B5HG2H7BPUC","created_at":"2026-07-05T01:46:21Z"},{"alias_kind":"pith_short_16","alias_value":"5B5HG2H7BPUCUTV7","created_at":"2026-07-05T01:46:21Z"},{"alias_kind":"pith_short_8","alias_value":"5B5HG2H7","created_at":"2026-07-05T01:46:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:5B5HG2H7BPUCUTV7RBTU2IGYNT","target":"record","payload":{"canonical_record":{"source":{"id":"2006.05045","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2020-06-09T04:45:30Z","cross_cats_sorted":[],"title_canon_sha256":"ead26be8ac7318bb3a7d678d9c59e29211fa4eb8353df91b438aac29e42fd942","abstract_canon_sha256":"499c7e3d4d1e0edd6ddb8e86a76d4042094bdca8ae5913025f201fd09362ea52"},"schema_version":"1.0"},"canonical_sha256":"e87a7368ff0be82a4ebf88674d20d86ce77915c808a2bc156d63eca9b88c03a1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:46:21.248350Z","signature_b64":"mObfN3JkZqgKbAAnTb3KYEHYnsFyQzg/sfi7f+8++4W8qLRsIZm8oy/UtXKr7LWd7fyCkfqWrfO+CjIjNpMADg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e87a7368ff0be82a4ebf88674d20d86ce77915c808a2bc156d63eca9b88c03a1","last_reissued_at":"2026-07-05T01:46:21.247766Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:46:21.247766Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2006.05045","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":"2026-07-05T01:46:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aeSWl7lb6YeFULBM2VXmjCHTeqyuOzjByphHGXPZqi6OgI3kDuHbS4iNEXjscsmdKKrHbwI8vfn4tVAzTkEiCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T06:51:33.960175Z"},"content_sha256":"8e29a395587525298e96d48c8d6010929d81e7dcf7c0fba43785d19637c84608","schema_version":"1.0","event_id":"sha256:8e29a395587525298e96d48c8d6010929d81e7dcf7c0fba43785d19637c84608"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:5B5HG2H7BPUCUTV7RBTU2IGYNT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Particle collisions near static spherically symmetric black holes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Eva Hackmann, Hemwati Nandan, Pankaj Sheoran","submitted_at":"2020-06-09T04:45:30Z","abstract_excerpt":"It has been shown by Ba\\~{n}ados, Silk and West (BSW) that the center of mass energy (E_cm) of test particles starting from rest at infinity and colliding near the horizon of a Schwarzschild black hole is always finite. In this communication, we extent the BSW scenario and study two particles with different energies colliding near the horizon of a static spherically symmetric black hole. Surprisingly, we find that even for the static spherically symmetric (i.e., Schwarzschild like) black holes it is possible to obtain an arbitrarily high E cm from the two test particles colliding near the hori"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2006.05045","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2006.05045/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":"2026-07-05T01:46:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gxe62NHeRQd4QtySiuhy2oo1IpjbQPJL+u+IHMgqgA6J3Y3rZv7MquZgHh14BoN1XBtjzZj7AcG68eXV+N1wAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T06:51:33.960664Z"},"content_sha256":"fb098923826fc5423dae6e8d66bc8d15f3995e51590c075b09e221c2f7ddbb0f","schema_version":"1.0","event_id":"sha256:fb098923826fc5423dae6e8d66bc8d15f3995e51590c075b09e221c2f7ddbb0f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5B5HG2H7BPUCUTV7RBTU2IGYNT/bundle.json","state_url":"https://pith.science/pith/5B5HG2H7BPUCUTV7RBTU2IGYNT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5B5HG2H7BPUCUTV7RBTU2IGYNT/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":"2026-08-09T06:51:33Z","links":{"resolver":"https://pith.science/pith/5B5HG2H7BPUCUTV7RBTU2IGYNT","bundle":"https://pith.science/pith/5B5HG2H7BPUCUTV7RBTU2IGYNT/bundle.json","state":"https://pith.science/pith/5B5HG2H7BPUCUTV7RBTU2IGYNT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5B5HG2H7BPUCUTV7RBTU2IGYNT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:5B5HG2H7BPUCUTV7RBTU2IGYNT","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":"499c7e3d4d1e0edd6ddb8e86a76d4042094bdca8ae5913025f201fd09362ea52","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2020-06-09T04:45:30Z","title_canon_sha256":"ead26be8ac7318bb3a7d678d9c59e29211fa4eb8353df91b438aac29e42fd942"},"schema_version":"1.0","source":{"id":"2006.05045","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2006.05045","created_at":"2026-07-05T01:46:21Z"},{"alias_kind":"arxiv_version","alias_value":"2006.05045v2","created_at":"2026-07-05T01:46:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2006.05045","created_at":"2026-07-05T01:46:21Z"},{"alias_kind":"pith_short_12","alias_value":"5B5HG2H7BPUC","created_at":"2026-07-05T01:46:21Z"},{"alias_kind":"pith_short_16","alias_value":"5B5HG2H7BPUCUTV7","created_at":"2026-07-05T01:46:21Z"},{"alias_kind":"pith_short_8","alias_value":"5B5HG2H7","created_at":"2026-07-05T01:46:21Z"}],"graph_snapshots":[{"event_id":"sha256:fb098923826fc5423dae6e8d66bc8d15f3995e51590c075b09e221c2f7ddbb0f","target":"graph","created_at":"2026-07-05T01:46:21Z","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/2006.05045/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"It has been shown by Ba\\~{n}ados, Silk and West (BSW) that the center of mass energy (E_cm) of test particles starting from rest at infinity and colliding near the horizon of a Schwarzschild black hole is always finite. In this communication, we extent the BSW scenario and study two particles with different energies colliding near the horizon of a static spherically symmetric black hole. Surprisingly, we find that even for the static spherically symmetric (i.e., Schwarzschild like) black holes it is possible to obtain an arbitrarily high E cm from the two test particles colliding near the hori","authors_text":"Eva Hackmann, Hemwati Nandan, Pankaj Sheoran","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2020-06-09T04:45:30Z","title":"Particle collisions near static spherically symmetric black holes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2006.05045","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":"sha256:8e29a395587525298e96d48c8d6010929d81e7dcf7c0fba43785d19637c84608","target":"record","created_at":"2026-07-05T01:46:21Z","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":"499c7e3d4d1e0edd6ddb8e86a76d4042094bdca8ae5913025f201fd09362ea52","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2020-06-09T04:45:30Z","title_canon_sha256":"ead26be8ac7318bb3a7d678d9c59e29211fa4eb8353df91b438aac29e42fd942"},"schema_version":"1.0","source":{"id":"2006.05045","kind":"arxiv","version":2}},"canonical_sha256":"e87a7368ff0be82a4ebf88674d20d86ce77915c808a2bc156d63eca9b88c03a1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e87a7368ff0be82a4ebf88674d20d86ce77915c808a2bc156d63eca9b88c03a1","first_computed_at":"2026-07-05T01:46:21.247766Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:46:21.247766Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mObfN3JkZqgKbAAnTb3KYEHYnsFyQzg/sfi7f+8++4W8qLRsIZm8oy/UtXKr7LWd7fyCkfqWrfO+CjIjNpMADg==","signature_status":"signed_v1","signed_at":"2026-07-05T01:46:21.248350Z","signed_message":"canonical_sha256_bytes"},"source_id":"2006.05045","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8e29a395587525298e96d48c8d6010929d81e7dcf7c0fba43785d19637c84608","sha256:fb098923826fc5423dae6e8d66bc8d15f3995e51590c075b09e221c2f7ddbb0f"],"state_sha256":"6827f061446faf9c75189dfdb2ceae1aba70fb4d3e546a3b6650d0d9e0e8c6aa"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xK4+dzeQKtxCbuTIiEuwy8XvfM2N3mR7nP627KN/oFwX5wI7u7rrgpFMmS9jaCCpOhgT7iYTUiev5KjgfX1ODw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-09T06:51:33.964227Z","bundle_sha256":"a2a5a0bc3d73218c0d90de5c762fd5311ddef1340ea336e5ab05daa44bdcd65d"}}