{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:EROXLZ3UU6IPMWKDOHMBAXKTXX","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":"8fded766d9c42ca2f9baa3cbaffc2621473ca4cd686a23972cb881fa1eba1cc4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2019-01-17T19:00:26Z","title_canon_sha256":"7999e813c59a1db4c396fbeaf19f106e906b3225e1adc1c9c3aa792fc5d205d4"},"schema_version":"1.0","source":{"id":"1901.05979","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.05979","created_at":"2026-05-17T23:45:30Z"},{"alias_kind":"arxiv_version","alias_value":"1901.05979v2","created_at":"2026-05-17T23:45:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.05979","created_at":"2026-05-17T23:45:30Z"},{"alias_kind":"pith_short_12","alias_value":"EROXLZ3UU6IP","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"EROXLZ3UU6IPMWKD","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"EROXLZ3U","created_at":"2026-05-18T12:33:15Z"}],"graph_snapshots":[{"event_id":"sha256:2f40db5b423a1d93942afeef492f6a0b8dee1b146cabada1f7d407ed5e2af5dd","target":"graph","created_at":"2026-05-17T23:45:30Z","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 study the effects of new physics in double Higgs production at future $e^+ e^-$ colliders. In the Standard Model the chiral limit ($m_e=0$) plays an important role for this process, being responsible for the smallness of the tree-level diagrams with respect to the 1-loop contributions. In our work, we consider the possibility of an enhancement due to the contribution of Standard Model dimension-six effective operators. We show that there are only two relevant operators for this process that are not yet (strongly) constrained by other data. We perform a sensitivity study on the operator coef","authors_text":"Alberto Tonero, Andres Vasquez, Celine Degrande, Rogerio Rosenfeld","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2019-01-17T19:00:26Z","title":"New Physics in Double Higgs Production at Future $e^+ e^-$ Colliders"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.05979","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:dec92e8ceeedee5e64a1adb18b3860825d3c779287c3ae0bb37730e05895e1bb","target":"record","created_at":"2026-05-17T23:45:30Z","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":"8fded766d9c42ca2f9baa3cbaffc2621473ca4cd686a23972cb881fa1eba1cc4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2019-01-17T19:00:26Z","title_canon_sha256":"7999e813c59a1db4c396fbeaf19f106e906b3225e1adc1c9c3aa792fc5d205d4"},"schema_version":"1.0","source":{"id":"1901.05979","kind":"arxiv","version":2}},"canonical_sha256":"245d75e774a790f6594371d8105d53bdc41a7f7c939ec8678e97340baf3c2922","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"245d75e774a790f6594371d8105d53bdc41a7f7c939ec8678e97340baf3c2922","first_computed_at":"2026-05-17T23:45:30.841039Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:45:30.841039Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NTP4KFHo+ne1psGNfCGVobPUe93BgekFZABWWdY2qfwPaLhWUCSdqJxE4mzIDt+C4ALwmQc72dxHEqm/MWktAQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:45:30.841668Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.05979","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dec92e8ceeedee5e64a1adb18b3860825d3c779287c3ae0bb37730e05895e1bb","sha256:2f40db5b423a1d93942afeef492f6a0b8dee1b146cabada1f7d407ed5e2af5dd"],"state_sha256":"72571af3f3887bf348f756239c65cfd91e868ce65f01b0dbfbb28d2b4eb74401"}