{"paper":{"title":"Antimatter $^4_{\\Lambda}$H Hypernucleus Production and the $^3_{\\Lambda}$H/$^3$He Puzzle in Relativistic Heavy-Ion Collisions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","hep-ph","nucl-ex"],"primary_cat":"nucl-th","authors_text":"Kai-Jia Sun, Lie-Wen Chen","submitted_at":"2015-12-02T13:54:50Z","abstract_excerpt":"We show that the measured yield ratio $^3_{\\Lambda}$H/$^3$He ($^3_{\\overline{\\Lambda}}\\overline{\\text{H}}$/$^3\\overline{\\text{He}}$) in Au+Au collisions at $\\sqrt{s_{NN}}=200$ GeV and in Pb+Pb collisions at $\\sqrt{s_{NN}}=2.76$ TeV can be understood within a covariant coalescence model if (anti-)$\\Lambda$ particles freeze out earlier than (anti-)nucleons but their relative freezeout time is closer at $\\sqrt{s_{NN}}=2.76$ TeV than at $\\sqrt{s_{NN}}=200$ GeV. The earlier (anti-)$\\Lambda$ freezeout can significantly enhance the yield of (anti)hypernucleus $^4_{\\Lambda}$H ($^4_{\\overline{\\Lambda}}"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.00692","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":""},"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"}