{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:MXJOS2JIKTXZ5ZIAUW57CDEFB2","short_pith_number":"pith:MXJOS2JI","canonical_record":{"source":{"id":"2108.13579","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-th","submitted_at":"2021-08-31T01:56:51Z","cross_cats_sorted":[],"title_canon_sha256":"27850d58320c75a2c5ee2bbdbd26581a224b94add082b2aae6a4b96684a2dc10","abstract_canon_sha256":"b1eef39fc1003dca2d68b178c3eac136cc2a7ef9f363760037483ae0d3e66a99"},"schema_version":"1.0"},"canonical_sha256":"65d2e9692854ef9ee500a5bbf10c850ea2ff13c52f67c7b2444468b371e993f1","source":{"kind":"arxiv","id":"2108.13579","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2108.13579","created_at":"2026-07-05T03:21:59Z"},{"alias_kind":"arxiv_version","alias_value":"2108.13579v2","created_at":"2026-07-05T03:21:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2108.13579","created_at":"2026-07-05T03:21:59Z"},{"alias_kind":"pith_short_12","alias_value":"MXJOS2JIKTXZ","created_at":"2026-07-05T03:21:59Z"},{"alias_kind":"pith_short_16","alias_value":"MXJOS2JIKTXZ5ZIA","created_at":"2026-07-05T03:21:59Z"},{"alias_kind":"pith_short_8","alias_value":"MXJOS2JI","created_at":"2026-07-05T03:21:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:MXJOS2JIKTXZ5ZIAUW57CDEFB2","target":"record","payload":{"canonical_record":{"source":{"id":"2108.13579","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-th","submitted_at":"2021-08-31T01:56:51Z","cross_cats_sorted":[],"title_canon_sha256":"27850d58320c75a2c5ee2bbdbd26581a224b94add082b2aae6a4b96684a2dc10","abstract_canon_sha256":"b1eef39fc1003dca2d68b178c3eac136cc2a7ef9f363760037483ae0d3e66a99"},"schema_version":"1.0"},"canonical_sha256":"65d2e9692854ef9ee500a5bbf10c850ea2ff13c52f67c7b2444468b371e993f1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:21:59.069622Z","signature_b64":"Rv3+39my5DRRTTTkLk0T8vwNWLB3E2fofOZkFnH+DU3G2otn+eOBjfNqJ2IE/aQJgnOAzPZ4jKx2bzDDIm6sDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"65d2e9692854ef9ee500a5bbf10c850ea2ff13c52f67c7b2444468b371e993f1","last_reissued_at":"2026-07-05T03:21:59.069107Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:21:59.069107Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2108.13579","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":"2026-07-05T03:21:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5BYIdBn4VFOvmxRMxjb3QaHJ6MmYddHNi/DAsxIzSHDJ2IN1ObkQOMHv04QE3dY7pHhEwHn28X/WIaGMQC4dDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-19T09:54:36.068596Z"},"content_sha256":"33489cb0d32b3dd4c5060a47e2f4de8319a8e1ac71fbd6b6fcf32d4ec9aab503","schema_version":"1.0","event_id":"sha256:33489cb0d32b3dd4c5060a47e2f4de8319a8e1ac71fbd6b6fcf32d4ec9aab503"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:MXJOS2JIKTXZ5ZIAUW57CDEFB2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Scattering of metastable lumps in a model with a false vacuum","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"hep-th","authors_text":"Adalto R. Gomes, Fabiano C. Simas, Fred C. Lima, K. Z. Nobrega","submitted_at":"2021-08-31T01:56:51Z","abstract_excerpt":"In this work we consider the scalar field model with a false vacuum proposed by A. T. Avelar, D. Bazeia, L. Losano and R. Menezes, Eur. Phys. J. C 55, 133-143 (2008). The model depends on a parameter $s>0$. The model has unstable nontopological lump solutions with a bell shape for small $s$, acquiring a flat plateau around the maximum for large $s$. For $s\\to\\infty$ the $\\phi^4$ model is recovered. We show that for $s\\gtrsim 2$ the lump is metastable with the only negative mode very close to zero. Metastable lumps can propagate and survive long enough to produce dynamical effects. Due to their"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2108.13579","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/2108.13579/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":"2026-07-05T03:21:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ps6MH6cqTO61lu+YywFqMWdLaeQen1csIxwLYwgG0lDyYED0cjBq4o28FoZrZHOzTfq478XJ0ppCgBnXr2bnBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-19T09:54:36.069172Z"},"content_sha256":"bdb10b647e3951e809fd9c8f919abf534f1960f69926b435a051c42feb8ea286","schema_version":"1.0","event_id":"sha256:bdb10b647e3951e809fd9c8f919abf534f1960f69926b435a051c42feb8ea286"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MXJOS2JIKTXZ5ZIAUW57CDEFB2/bundle.json","state_url":"https://pith.science/pith/MXJOS2JIKTXZ5ZIAUW57CDEFB2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MXJOS2JIKTXZ5ZIAUW57CDEFB2/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":"2026-08-19T09:54:36Z","links":{"resolver":"https://pith.science/pith/MXJOS2JIKTXZ5ZIAUW57CDEFB2","bundle":"https://pith.science/pith/MXJOS2JIKTXZ5ZIAUW57CDEFB2/bundle.json","state":"https://pith.science/pith/MXJOS2JIKTXZ5ZIAUW57CDEFB2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MXJOS2JIKTXZ5ZIAUW57CDEFB2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:MXJOS2JIKTXZ5ZIAUW57CDEFB2","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":"b1eef39fc1003dca2d68b178c3eac136cc2a7ef9f363760037483ae0d3e66a99","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-th","submitted_at":"2021-08-31T01:56:51Z","title_canon_sha256":"27850d58320c75a2c5ee2bbdbd26581a224b94add082b2aae6a4b96684a2dc10"},"schema_version":"1.0","source":{"id":"2108.13579","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2108.13579","created_at":"2026-07-05T03:21:59Z"},{"alias_kind":"arxiv_version","alias_value":"2108.13579v2","created_at":"2026-07-05T03:21:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2108.13579","created_at":"2026-07-05T03:21:59Z"},{"alias_kind":"pith_short_12","alias_value":"MXJOS2JIKTXZ","created_at":"2026-07-05T03:21:59Z"},{"alias_kind":"pith_short_16","alias_value":"MXJOS2JIKTXZ5ZIA","created_at":"2026-07-05T03:21:59Z"},{"alias_kind":"pith_short_8","alias_value":"MXJOS2JI","created_at":"2026-07-05T03:21:59Z"}],"graph_snapshots":[{"event_id":"sha256:bdb10b647e3951e809fd9c8f919abf534f1960f69926b435a051c42feb8ea286","target":"graph","created_at":"2026-07-05T03:21:59Z","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/2108.13579/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In this work we consider the scalar field model with a false vacuum proposed by A. T. Avelar, D. Bazeia, L. Losano and R. Menezes, Eur. Phys. J. C 55, 133-143 (2008). The model depends on a parameter $s>0$. The model has unstable nontopological lump solutions with a bell shape for small $s$, acquiring a flat plateau around the maximum for large $s$. For $s\\to\\infty$ the $\\phi^4$ model is recovered. We show that for $s\\gtrsim 2$ the lump is metastable with the only negative mode very close to zero. Metastable lumps can propagate and survive long enough to produce dynamical effects. Due to their","authors_text":"Adalto R. Gomes, Fabiano C. Simas, Fred C. Lima, K. Z. Nobrega","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-th","submitted_at":"2021-08-31T01:56:51Z","title":"Scattering of metastable lumps in a model with a false vacuum"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2108.13579","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":"sha256:33489cb0d32b3dd4c5060a47e2f4de8319a8e1ac71fbd6b6fcf32d4ec9aab503","target":"record","created_at":"2026-07-05T03:21:59Z","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":"b1eef39fc1003dca2d68b178c3eac136cc2a7ef9f363760037483ae0d3e66a99","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-th","submitted_at":"2021-08-31T01:56:51Z","title_canon_sha256":"27850d58320c75a2c5ee2bbdbd26581a224b94add082b2aae6a4b96684a2dc10"},"schema_version":"1.0","source":{"id":"2108.13579","kind":"arxiv","version":2}},"canonical_sha256":"65d2e9692854ef9ee500a5bbf10c850ea2ff13c52f67c7b2444468b371e993f1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"65d2e9692854ef9ee500a5bbf10c850ea2ff13c52f67c7b2444468b371e993f1","first_computed_at":"2026-07-05T03:21:59.069107Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:21:59.069107Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Rv3+39my5DRRTTTkLk0T8vwNWLB3E2fofOZkFnH+DU3G2otn+eOBjfNqJ2IE/aQJgnOAzPZ4jKx2bzDDIm6sDA==","signature_status":"signed_v1","signed_at":"2026-07-05T03:21:59.069622Z","signed_message":"canonical_sha256_bytes"},"source_id":"2108.13579","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:33489cb0d32b3dd4c5060a47e2f4de8319a8e1ac71fbd6b6fcf32d4ec9aab503","sha256:bdb10b647e3951e809fd9c8f919abf534f1960f69926b435a051c42feb8ea286"],"state_sha256":"8e707a21639b762b9aec6c22b9106869d0fe27aa09f7d3888781842a2f635924"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mJ8BiFxd84xjUgO62V1y2AjmbpPwXIaEl/3L2mMGh+0FMl79DXrLS4yDpuceKJxnu4C7fvou6SBQ2adw44lZCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-19T09:54:36.073374Z","bundle_sha256":"ce2cd4ee38ed619122cd60352aafa790af32ffcf2cd767236ae34ae9016677b0"}}