{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:K7X5U7AFA4WVHGASRGEIMAX44L","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":"dfd1b54931639bb19442e9c979456d6a979e32e42ef6bca8d80e75152f1a4887","cross_cats_sorted":["hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2014-01-07T17:27:50Z","title_canon_sha256":"3ee47c009b6c70fa875acfb4626809c3ddffbb19a30d3361d7c2c1047459bb3d"},"schema_version":"1.0","source":{"id":"1401.1449","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1401.1449","created_at":"2026-05-18T02:20:29Z"},{"alias_kind":"arxiv_version","alias_value":"1401.1449v2","created_at":"2026-05-18T02:20:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1401.1449","created_at":"2026-05-18T02:20:29Z"},{"alias_kind":"pith_short_12","alias_value":"K7X5U7AFA4WV","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_16","alias_value":"K7X5U7AFA4WVHGAS","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_8","alias_value":"K7X5U7AF","created_at":"2026-05-18T12:28:35Z"}],"graph_snapshots":[{"event_id":"sha256:27cab818223ed579db757ed0eef4b97f665c1e373b53a7678349ddd7fbdfbd55","target":"graph","created_at":"2026-05-18T02:20:29Z","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 consider a class of on-shell constrained mass variables that are 3+1 dimensional generalizations of the Cambridge $M_{T2}$ variable and that automatically incorporate various assumptions about the underlying event topology. The presence of additional on-shell constraints causes their kinematic distributions to exhibit sharper endpoints than the usual $M_{T2}$ distribution. We study the mathematical properties of these new variables, e.g., the uniqueness of the solution selected by the minimization over the invisible particle 4-momenta. We then use this solution to reconstruct the masses of ","authors_text":"Doojin Kim, Filip Moortgat, James S. Gainer, Konstantin T. Matchev, Luc Pape, Myeonghun Park, Won Sang Cho","cross_cats":["hep-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2014-01-07T17:27:50Z","title":"On-shell constrained $M_2$ variables with applications to mass measurements and topology disambiguation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1401.1449","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":"sha256:6dff1a6fdda37bac8bdccae06f4d20d9191cdd210084d3e0cf06b21c247bdd4d","target":"record","created_at":"2026-05-18T02:20:29Z","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":"dfd1b54931639bb19442e9c979456d6a979e32e42ef6bca8d80e75152f1a4887","cross_cats_sorted":["hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2014-01-07T17:27:50Z","title_canon_sha256":"3ee47c009b6c70fa875acfb4626809c3ddffbb19a30d3361d7c2c1047459bb3d"},"schema_version":"1.0","source":{"id":"1401.1449","kind":"arxiv","version":2}},"canonical_sha256":"57efda7c05072d53981289888602fce2cb4305601ea63e4a70f1a65a0b365013","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"57efda7c05072d53981289888602fce2cb4305601ea63e4a70f1a65a0b365013","first_computed_at":"2026-05-18T02:20:29.014023Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:20:29.014023Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aAEnRFNc5TqT24WuUNuI74Wf7p42lHY7KahxxcJNT1+7gwfTiTg7ueZPJcZrmD/QKKJQvJezcz8NQsONz0XQBw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:20:29.014742Z","signed_message":"canonical_sha256_bytes"},"source_id":"1401.1449","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6dff1a6fdda37bac8bdccae06f4d20d9191cdd210084d3e0cf06b21c247bdd4d","sha256:27cab818223ed579db757ed0eef4b97f665c1e373b53a7678349ddd7fbdfbd55"],"state_sha256":"04a1854617f296007b5ef19a30978658e827d4e89c23cb16b9963170746e9042"}