{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:FE2CFR2667QS7HUQRGA4CFUDCG","short_pith_number":"pith:FE2CFR26","canonical_record":{"source":{"id":"2606.17320","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ex","submitted_at":"2026-06-15T22:03:55Z","cross_cats_sorted":[],"title_canon_sha256":"30064e09fde0657880ab34e979017bdb286a83d2efec6a6bcf0ae0cb2c4ac89c","abstract_canon_sha256":"e9f5752791a4f77129b5113529fcbe1ccab0bcfd0e9fa3f21416c617e93464bf"},"schema_version":"1.0"},"canonical_sha256":"293422c75ef7e12f9e908981c11683119800a028ee36dff8bbdf78e9f5d48edd","source":{"kind":"arxiv","id":"2606.17320","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.17320","created_at":"2026-06-19T16:10:09Z"},{"alias_kind":"arxiv_version","alias_value":"2606.17320v1","created_at":"2026-06-19T16:10:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.17320","created_at":"2026-06-19T16:10:09Z"},{"alias_kind":"pith_short_12","alias_value":"FE2CFR2667QS","created_at":"2026-06-19T16:10:09Z"},{"alias_kind":"pith_short_16","alias_value":"FE2CFR2667QS7HUQ","created_at":"2026-06-19T16:10:09Z"},{"alias_kind":"pith_short_8","alias_value":"FE2CFR26","created_at":"2026-06-19T16:10:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:FE2CFR2667QS7HUQRGA4CFUDCG","target":"record","payload":{"canonical_record":{"source":{"id":"2606.17320","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ex","submitted_at":"2026-06-15T22:03:55Z","cross_cats_sorted":[],"title_canon_sha256":"30064e09fde0657880ab34e979017bdb286a83d2efec6a6bcf0ae0cb2c4ac89c","abstract_canon_sha256":"e9f5752791a4f77129b5113529fcbe1ccab0bcfd0e9fa3f21416c617e93464bf"},"schema_version":"1.0"},"canonical_sha256":"293422c75ef7e12f9e908981c11683119800a028ee36dff8bbdf78e9f5d48edd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-19T16:10:09.098796Z","signature_b64":"mdxq0xMp3aI/g5Sr4BbWoFbi0iKXFgwmkfbQdoFFTnktoOgJstm7IigTY6aO7oqSV1eXJij24ntztICq9bi7Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"293422c75ef7e12f9e908981c11683119800a028ee36dff8bbdf78e9f5d48edd","last_reissued_at":"2026-06-19T16:10:09.098429Z","signature_status":"signed_v1","first_computed_at":"2026-06-19T16:10:09.098429Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.17320","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":"2026-06-19T16:10:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fmUpJej6GALBmAWwiLPT2m33x9V63lubyZQlaY/ELoOlfQ/YGJ7z8CpnsPk9u5nmkYWC7HjnGOim24gE8M2bAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T18:54:35.478566Z"},"content_sha256":"8b2f0641c8ddbb80826c867101f41c96be8c8db3cbbcd71c9885cb7b860078d4","schema_version":"1.0","event_id":"sha256:8b2f0641c8ddbb80826c867101f41c96be8c8db3cbbcd71c9885cb7b860078d4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:FE2CFR2667QS7HUQRGA4CFUDCG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Improved limits on a new $Z'$ in $B-L$ scenarios with the NA64 experiment at CERN","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"A. Antonov, A. Celentano, A. E. Karneyeu, A. Marini, A. N. Toropin, A. S. Zhevlakov, A. V. Dermenev, B. Banto Oberhauser, B. Ketzer, B. Radics, D. Banerjee, D. Shchukin, D. V. Kirpichnikov, D. V. Peshekhonov, G. Kekelidze, H. Sieber, I. Tlisova, I. V. Voronchikhin, J. Bernhard, J. Zamora-Sa'a, K. Salamatin, L. Marsicano, L. Molina Bueno, L. V. Kravchuk, M. A. Ayala Torres, M. H\\\"osgen, M. M. Kirsanov, M. Mongillo, M. Tuzi, N. Charitonidis, N. V. Krasnikov, O. Soto, P. Bisio, P. Crivelli, P. V. Volkov, R. Mena Fredes, R. Mena Yanssen, R. R. Dusaev, S. Girod, S. N. Gninenko, S. V. Donskov, S. V. Gertsenberger, S. V. Kuleshov, T. Enik, The NA64 Collaboration: Yu. M. Andreev, V. A. Kramarenko, V. A. Matveev, V. A. Polyakov, V. Bautin, V. D. Samoylenko, V. E. Lyubovitskij, V. Lysan, V. N. Frolov, V. O. Tikhomirov, Y. Kambar","submitted_at":"2026-06-15T22:03:55Z","abstract_excerpt":"Extensions of the Standard Model featuring an additional $U(1)_{B-L}$ gauge symmetry provide a compelling framework linking the origin of neutrino masses to possible dark matter candidates. The associated gauge boson, $Z'$, couples directly to Standard Model fermions and can be produced in fixed-target experiments through electron-nucleus interactions. In this work, we present new constraints on the coupling constant $g_{B-L}$ obtained with the NA64 experiment using the full electron-beam dataset collected between 2016 and 2022, corresponding to $(9.4\\pm0.5)\\times10^{11}$ electrons on target. "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.17320","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2606.17320/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":"2026-06-19T16:10:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iWimlYsBABtWnSr0iPkshu4arZBVNO8/It+9mpRBmjHMq+B5ZZLYlWcxPH79jt9F+S5meB3WD4jY1mhKYpeKCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T18:54:35.478945Z"},"content_sha256":"0205f2248408cdf7ecf858798caff7a5607406d72759e48de60e8fa26bd6053c","schema_version":"1.0","event_id":"sha256:0205f2248408cdf7ecf858798caff7a5607406d72759e48de60e8fa26bd6053c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FE2CFR2667QS7HUQRGA4CFUDCG/bundle.json","state_url":"https://pith.science/pith/FE2CFR2667QS7HUQRGA4CFUDCG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FE2CFR2667QS7HUQRGA4CFUDCG/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":"2026-06-27T18:54:35Z","links":{"resolver":"https://pith.science/pith/FE2CFR2667QS7HUQRGA4CFUDCG","bundle":"https://pith.science/pith/FE2CFR2667QS7HUQRGA4CFUDCG/bundle.json","state":"https://pith.science/pith/FE2CFR2667QS7HUQRGA4CFUDCG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FE2CFR2667QS7HUQRGA4CFUDCG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:FE2CFR2667QS7HUQRGA4CFUDCG","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":"e9f5752791a4f77129b5113529fcbe1ccab0bcfd0e9fa3f21416c617e93464bf","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ex","submitted_at":"2026-06-15T22:03:55Z","title_canon_sha256":"30064e09fde0657880ab34e979017bdb286a83d2efec6a6bcf0ae0cb2c4ac89c"},"schema_version":"1.0","source":{"id":"2606.17320","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.17320","created_at":"2026-06-19T16:10:09Z"},{"alias_kind":"arxiv_version","alias_value":"2606.17320v1","created_at":"2026-06-19T16:10:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.17320","created_at":"2026-06-19T16:10:09Z"},{"alias_kind":"pith_short_12","alias_value":"FE2CFR2667QS","created_at":"2026-06-19T16:10:09Z"},{"alias_kind":"pith_short_16","alias_value":"FE2CFR2667QS7HUQ","created_at":"2026-06-19T16:10:09Z"},{"alias_kind":"pith_short_8","alias_value":"FE2CFR26","created_at":"2026-06-19T16:10:09Z"}],"graph_snapshots":[{"event_id":"sha256:0205f2248408cdf7ecf858798caff7a5607406d72759e48de60e8fa26bd6053c","target":"graph","created_at":"2026-06-19T16:10:09Z","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/2606.17320/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Extensions of the Standard Model featuring an additional $U(1)_{B-L}$ gauge symmetry provide a compelling framework linking the origin of neutrino masses to possible dark matter candidates. The associated gauge boson, $Z'$, couples directly to Standard Model fermions and can be produced in fixed-target experiments through electron-nucleus interactions. In this work, we present new constraints on the coupling constant $g_{B-L}$ obtained with the NA64 experiment using the full electron-beam dataset collected between 2016 and 2022, corresponding to $(9.4\\pm0.5)\\times10^{11}$ electrons on target. ","authors_text":"A. Antonov, A. Celentano, A. E. Karneyeu, A. Marini, A. N. Toropin, A. S. Zhevlakov, A. V. Dermenev, B. Banto Oberhauser, B. Ketzer, B. Radics, D. Banerjee, D. Shchukin, D. V. Kirpichnikov, D. V. Peshekhonov, G. Kekelidze, H. Sieber, I. Tlisova, I. V. Voronchikhin, J. Bernhard, J. Zamora-Sa'a, K. Salamatin, L. Marsicano, L. Molina Bueno, L. V. Kravchuk, M. A. Ayala Torres, M. H\\\"osgen, M. M. Kirsanov, M. Mongillo, M. Tuzi, N. Charitonidis, N. V. Krasnikov, O. Soto, P. Bisio, P. Crivelli, P. V. Volkov, R. Mena Fredes, R. Mena Yanssen, R. R. Dusaev, S. Girod, S. N. Gninenko, S. V. Donskov, S. V. Gertsenberger, S. V. Kuleshov, T. Enik, The NA64 Collaboration: Yu. M. Andreev, V. A. Kramarenko, V. A. Matveev, V. A. Polyakov, V. Bautin, V. D. Samoylenko, V. E. Lyubovitskij, V. Lysan, V. N. Frolov, V. O. Tikhomirov, Y. Kambar","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ex","submitted_at":"2026-06-15T22:03:55Z","title":"Improved limits on a new $Z'$ in $B-L$ scenarios with the NA64 experiment at CERN"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.17320","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":"sha256:8b2f0641c8ddbb80826c867101f41c96be8c8db3cbbcd71c9885cb7b860078d4","target":"record","created_at":"2026-06-19T16:10:09Z","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":"e9f5752791a4f77129b5113529fcbe1ccab0bcfd0e9fa3f21416c617e93464bf","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ex","submitted_at":"2026-06-15T22:03:55Z","title_canon_sha256":"30064e09fde0657880ab34e979017bdb286a83d2efec6a6bcf0ae0cb2c4ac89c"},"schema_version":"1.0","source":{"id":"2606.17320","kind":"arxiv","version":1}},"canonical_sha256":"293422c75ef7e12f9e908981c11683119800a028ee36dff8bbdf78e9f5d48edd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"293422c75ef7e12f9e908981c11683119800a028ee36dff8bbdf78e9f5d48edd","first_computed_at":"2026-06-19T16:10:09.098429Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-19T16:10:09.098429Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mdxq0xMp3aI/g5Sr4BbWoFbi0iKXFgwmkfbQdoFFTnktoOgJstm7IigTY6aO7oqSV1eXJij24ntztICq9bi7Cg==","signature_status":"signed_v1","signed_at":"2026-06-19T16:10:09.098796Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.17320","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8b2f0641c8ddbb80826c867101f41c96be8c8db3cbbcd71c9885cb7b860078d4","sha256:0205f2248408cdf7ecf858798caff7a5607406d72759e48de60e8fa26bd6053c"],"state_sha256":"e6ccf1b73106fd21f5ab07bc1de37591b1c55d8392c890ac04876c68d8a48db0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IVici7z3AwSijWoQbf9nbcldpFHMa6M8+db9txoSvojRpeVmTCQdBwBkiylDhWG1cw+DgTNu3WNUj2JwM5kgBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-27T18:54:35.480901Z","bundle_sha256":"ea8fc10e041e17a9c37737b05246756c1d216fe538354aca02b954c6a9e490ee"}}