{"paper":{"title":"Impact of neutron-proton pairing on the nucleon high-momentum distribution in symmetric nuclear matter","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"Neutron-proton pairing increases the high-momentum fraction of nucleons by a maximum of about 6 percent relative to short-range correlations in symmetric nuclear matter.","cross_cats":[],"primary_cat":"nucl-th","authors_text":"Guo-peng Li, Jian-min Dong, Jin Zhou, Ji-you Fu, Wei Zuo, Xin-le Shang","submitted_at":"2026-04-07T04:10:14Z","abstract_excerpt":"The effect of neutron-proton ($np$) pairing on the high-momentum tail (HMT) of nucleon momentum distributions in symmetric nuclear matter is investigated within a combined framework of the extended Brueckner-Hartree-Fock approach with off-shell BCS theory. The HMT ratio, quantifying the high-momentum fraction in the BCS state relative to the normal state, reaches about $1.06$ around the density of $0.052\\ \\mathrm{fm}^{-3}$, indicating that the maximal contribution of the $np$ pairing, amounts to approximately 6\\% that from short-range correlations (SRCs). This contribution exhibits a density d"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"The HMT ratio, quantifying the high-momentum fraction in the BCS state relative to the normal state, reaches about 1.06 around the density of 0.052 fm^{-3}, indicating that the maximal contribution of the np pairing amounts to approximately 6% that from short-range correlations (SRCs).","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The extended Brueckner-Hartree-Fock approach combined with off-shell BCS theory accurately captures the interplay between np pairing and short-range correlations without significant missing higher-order effects or model-specific artifacts.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Neutron-proton pairing contributes approximately 6% to the high-momentum tail relative to short-range correlations at density 0.052 fm^{-3}, with density dependence following the squared relative pairing gap over effective kinetic energy.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Neutron-proton pairing increases the high-momentum fraction of nucleons by a maximum of about 6 percent relative to short-range correlations in symmetric nuclear matter.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"a1fa3ea3af55a6a322d7dd9b2e17bce177d980cd1c5cddcfdd119aed02c2741c"},"source":{"id":"2604.05410","kind":"arxiv","version":2},"verdict":{"id":"04c54f92-2973-431d-a31b-128f8cbe24c8","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-10T19:28:29.462771Z","strongest_claim":"The HMT ratio, quantifying the high-momentum fraction in the BCS state relative to the normal state, reaches about 1.06 around the density of 0.052 fm^{-3}, indicating that the maximal contribution of the np pairing amounts to approximately 6% that from short-range correlations (SRCs).","one_line_summary":"Neutron-proton pairing contributes approximately 6% to the high-momentum tail relative to short-range correlations at density 0.052 fm^{-3}, with density dependence following the squared relative pairing gap over effective kinetic energy.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The extended Brueckner-Hartree-Fock approach combined with off-shell BCS theory accurately captures the interplay between np pairing and short-range correlations without significant missing higher-order effects or model-specific artifacts.","pith_extraction_headline":"Neutron-proton pairing increases the high-momentum fraction of nucleons by a maximum of about 6 percent relative to short-range correlations in symmetric nuclear matter."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2604.05410/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":1,"snapshot_sha256":"410dc0260907d906fcf7616c27ba919097ab9c64c43654584a951ecd11cf6cb7"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}