{"paper":{"title":"Comparison of heavy-ion transport simulations: Collision integral with pions and $\\Delta$ resonances in a box","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-ex"],"primary_cat":"nucl-th","authors_text":"Akira Ohnishi, Akira Ono, Bao-An Li, Che Ming Ko, Dan Cozma, Dmytro Oliinychenko, Feng-Shou Zhang, Hannah Elfner, Hermann Wolter, Jun Su, Jun Xu, Lie-Wen Chen, ManYee Betty Tsang, Maria Colonna, Natsumi Ikeno, Pawel Danielewicz, Swagata Mallik, Taesoo Song, Tatsuhiko Ogawa, Yasushi Nara, Ying-Xun Zhang, Yong-Jia Wang, Zhao-Qing Feng, Zhen Zhang","submitted_at":"2019-04-05T06:34:40Z","abstract_excerpt":"We compare ten transport codes for a system confined in a box, aiming at improved handling of the production of $\\Delta$ resonances and pions, which is indispensable for constraining high-density symmetry energy from observables such as the $\\pi^-/\\pi^+$ yield ratio in heavy-ion collisions. The system in a box is initialized with nucleons at saturation density and at 60 MeV temperature. The reactions $NN\\leftrightarrow N\\Delta$ and $\\Delta\\leftrightarrow N\\pi$ are implemented, but the Pauli blocking and the mean-field potential are deactivated in the present comparison. Results are compared to"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.02888","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1904.02888/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"}