{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:XWFNK7XIZSXANICCIAQUPWSBOM","short_pith_number":"pith:XWFNK7XI","canonical_record":{"source":{"id":"1106.2421","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2011-06-13T11:56:48Z","cross_cats_sorted":[],"title_canon_sha256":"a4bda9eb2e08cba36bedc2965e6d0a21b40ed76480587ff490b6475ca8d18dfa","abstract_canon_sha256":"80b7324a292776e16dab435b1c1ad1fa7c471b16a46b4cc24d0becc9dac1a51f"},"schema_version":"1.0"},"canonical_sha256":"bd8ad57ee8ccae06a042402147da41730706a255312d8f13df28ad7b0ea88802","source":{"kind":"arxiv","id":"1106.2421","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1106.2421","created_at":"2026-05-18T04:04:18Z"},{"alias_kind":"arxiv_version","alias_value":"1106.2421v1","created_at":"2026-05-18T04:04:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1106.2421","created_at":"2026-05-18T04:04:18Z"},{"alias_kind":"pith_short_12","alias_value":"XWFNK7XIZSXA","created_at":"2026-05-18T12:26:47Z"},{"alias_kind":"pith_short_16","alias_value":"XWFNK7XIZSXANICC","created_at":"2026-05-18T12:26:47Z"},{"alias_kind":"pith_short_8","alias_value":"XWFNK7XI","created_at":"2026-05-18T12:26:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:XWFNK7XIZSXANICCIAQUPWSBOM","target":"record","payload":{"canonical_record":{"source":{"id":"1106.2421","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2011-06-13T11:56:48Z","cross_cats_sorted":[],"title_canon_sha256":"a4bda9eb2e08cba36bedc2965e6d0a21b40ed76480587ff490b6475ca8d18dfa","abstract_canon_sha256":"80b7324a292776e16dab435b1c1ad1fa7c471b16a46b4cc24d0becc9dac1a51f"},"schema_version":"1.0"},"canonical_sha256":"bd8ad57ee8ccae06a042402147da41730706a255312d8f13df28ad7b0ea88802","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:04:18.987875Z","signature_b64":"oLV1Ub2yN95bWZ5R0zeiTGTMaPRtm0CwyheM45reVknTA+orZUtHcIOntDkMFSI2eKYR45siafc6AS84gYXuDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bd8ad57ee8ccae06a042402147da41730706a255312d8f13df28ad7b0ea88802","last_reissued_at":"2026-05-18T04:04:18.987270Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:04:18.987270Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1106.2421","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":"2026-05-18T04:04:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+z/USfIMIWzMWlyOE2EpYMbmhO5VRNCbn3+JnS1rKuMrXjPkjrYPIHoE+faNu1rv0UMJYQ4vCXi9iHFDorYXAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-12T02:20:57.781765Z"},"content_sha256":"68edcd8e35c2076c377dee3ad4f1e6983b2d1d78158a61368b50add051397686","schema_version":"1.0","event_id":"sha256:68edcd8e35c2076c377dee3ad4f1e6983b2d1d78158a61368b50add051397686"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:XWFNK7XIZSXANICCIAQUPWSBOM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Proton inelastic diffraction by a black nucleus and the size of excited nuclei","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-th","authors_text":"Akihisa Kohama, Kazuhiro Oyamatsu, Kei Iida, Shinya Koide","submitted_at":"2011-06-13T11:56:48Z","abstract_excerpt":"We systematically derive a length scale characterizing the size of a low-lying, beta stable nucleus from empirical data for the diffraction peak angle in the proton inelastic differential cross section of incident energy of \\sim 1 GeV. In doing so, we assume that the target nucleus in the ground state is a completely absorptive \"black\" sphere of radius a. The cross section \\pi a^2, where a is determined in such a way as to reproduce the empirical proton diffraction peak angle in the elastic channel, is known to agree with empirical total reaction cross sections for incident protons to within e"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1106.2421","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":""},"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":"2026-05-18T04:04:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FoYpVljgd8UL4aSuVRPy9Of1qD5NHdP6Pt3hHRVbZ6Atrc7Hx2nLRxolcXj5l+qhO18GfD1xT9Y5slEStqUPBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-12T02:20:57.782477Z"},"content_sha256":"18c788adfa311960f02d6046efadda8f2d8113a2b6dd52a70edded1f1361825e","schema_version":"1.0","event_id":"sha256:18c788adfa311960f02d6046efadda8f2d8113a2b6dd52a70edded1f1361825e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XWFNK7XIZSXANICCIAQUPWSBOM/bundle.json","state_url":"https://pith.science/pith/XWFNK7XIZSXANICCIAQUPWSBOM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XWFNK7XIZSXANICCIAQUPWSBOM/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":"2026-06-12T02:20:57Z","links":{"resolver":"https://pith.science/pith/XWFNK7XIZSXANICCIAQUPWSBOM","bundle":"https://pith.science/pith/XWFNK7XIZSXANICCIAQUPWSBOM/bundle.json","state":"https://pith.science/pith/XWFNK7XIZSXANICCIAQUPWSBOM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XWFNK7XIZSXANICCIAQUPWSBOM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:XWFNK7XIZSXANICCIAQUPWSBOM","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":"80b7324a292776e16dab435b1c1ad1fa7c471b16a46b4cc24d0becc9dac1a51f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2011-06-13T11:56:48Z","title_canon_sha256":"a4bda9eb2e08cba36bedc2965e6d0a21b40ed76480587ff490b6475ca8d18dfa"},"schema_version":"1.0","source":{"id":"1106.2421","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1106.2421","created_at":"2026-05-18T04:04:18Z"},{"alias_kind":"arxiv_version","alias_value":"1106.2421v1","created_at":"2026-05-18T04:04:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1106.2421","created_at":"2026-05-18T04:04:18Z"},{"alias_kind":"pith_short_12","alias_value":"XWFNK7XIZSXA","created_at":"2026-05-18T12:26:47Z"},{"alias_kind":"pith_short_16","alias_value":"XWFNK7XIZSXANICC","created_at":"2026-05-18T12:26:47Z"},{"alias_kind":"pith_short_8","alias_value":"XWFNK7XI","created_at":"2026-05-18T12:26:47Z"}],"graph_snapshots":[{"event_id":"sha256:18c788adfa311960f02d6046efadda8f2d8113a2b6dd52a70edded1f1361825e","target":"graph","created_at":"2026-05-18T04:04:18Z","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 systematically derive a length scale characterizing the size of a low-lying, beta stable nucleus from empirical data for the diffraction peak angle in the proton inelastic differential cross section of incident energy of \\sim 1 GeV. In doing so, we assume that the target nucleus in the ground state is a completely absorptive \"black\" sphere of radius a. The cross section \\pi a^2, where a is determined in such a way as to reproduce the empirical proton diffraction peak angle in the elastic channel, is known to agree with empirical total reaction cross sections for incident protons to within e","authors_text":"Akihisa Kohama, Kazuhiro Oyamatsu, Kei Iida, Shinya Koide","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2011-06-13T11:56:48Z","title":"Proton inelastic diffraction by a black nucleus and the size of excited nuclei"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1106.2421","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":"sha256:68edcd8e35c2076c377dee3ad4f1e6983b2d1d78158a61368b50add051397686","target":"record","created_at":"2026-05-18T04:04:18Z","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":"80b7324a292776e16dab435b1c1ad1fa7c471b16a46b4cc24d0becc9dac1a51f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2011-06-13T11:56:48Z","title_canon_sha256":"a4bda9eb2e08cba36bedc2965e6d0a21b40ed76480587ff490b6475ca8d18dfa"},"schema_version":"1.0","source":{"id":"1106.2421","kind":"arxiv","version":1}},"canonical_sha256":"bd8ad57ee8ccae06a042402147da41730706a255312d8f13df28ad7b0ea88802","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bd8ad57ee8ccae06a042402147da41730706a255312d8f13df28ad7b0ea88802","first_computed_at":"2026-05-18T04:04:18.987270Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:04:18.987270Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"oLV1Ub2yN95bWZ5R0zeiTGTMaPRtm0CwyheM45reVknTA+orZUtHcIOntDkMFSI2eKYR45siafc6AS84gYXuDA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:04:18.987875Z","signed_message":"canonical_sha256_bytes"},"source_id":"1106.2421","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:68edcd8e35c2076c377dee3ad4f1e6983b2d1d78158a61368b50add051397686","sha256:18c788adfa311960f02d6046efadda8f2d8113a2b6dd52a70edded1f1361825e"],"state_sha256":"ee31a0e411b7024e4678188dced3b652dd1daec2a5310fb44f757efa8c4bb9f0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ogjh3wfCoOYB0RZKE9o4PtEJm0veQNpJaXXX9PAPQrjx3D5MicjTd+U2G5P+j1xrDe/SoNc7TisRy7iVkoKkBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-12T02:20:57.787731Z","bundle_sha256":"82758af1838d3c68dc43b2363a8857dd12ea235e07fa2e1ba6b0d813163ec87b"}}