{"paper":{"title":"Isoscalar Single-Pion Production in the Region of Roper and $d^*(2380)$ Resonances","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"nucl-ex","authors_text":"A. Bondar, A. Erven, A. Goswami K. Grigoryev, A. Khoukaz, A. Kupsc, A. Kuzmin, A. Magiera, A. Pyszniak, A. Roy, A. Szczurek, A. Trzcinski, A. Wronska, A. Yamamoto, B. Kamys, B. K{\\l}os, B. Lorentz, B. Marianski, B. Shwartz, C.-O. Gullstr\\\"om, D. A. Kirillov, D. Lersch, D. Prasuhn, D. Pszczel, E. Czerwinski, E. Perez del Rio, E. Stephan, F. Goldenbaum, F. S. Bergmann, G. Kemmerling, G. Khatri, G. Sterzenbach, H. Bhatt, H. Calen, H. Clement, H. Kleines, H. Ohm, H.-P. Morsch, H. Stockhorst, H. Str\\\"oher, I. Ciepa{\\l}, I. Sch\\\"atti-Ozerianska, J. Ritman, J. Smyrski, J. Stepaniak, J. Zabierowski, J. Z{\\l}omanczuk, K. Demmich, K. F\\\"ohl, K. Fransson, K. Lalwani, K. Pysz, K. Sitterberg, L. Heijkenskj\\\"old, L. Jarczyk, M. Bashkanov, M. Ber{\\l}owski, M. B\\\"uscher, M. J. Zielinski, M. Skurzok, M. Wolke, M. Zurek, N. H\\\"usken, N. M. Piskunov, O. Khreptak, O. Rundel, P. Fedorets, P. Kulessa, P. Marciniewski, P. Moskal, P. W\\\"ustner, P. Zupranski, R. Engels, R. Maier, R. Stassen, R. Varma, S. Kistryn, S. Sawant, S. Schadmand, T. Johansson, T. Sefzick, T. Skorodko, V. Hejny, V. Serdyuk, V. Sopov, WASA-at-COSY Collaboration: P. Adlarson, W. Augustyniak, W. Bardan, W. Erven, W. Eyrich, W. Krzemien, W. Parol, Z. Rudy","submitted_at":"2017-02-23T13:52:07Z","abstract_excerpt":"Exclusive measurements of the quasi-free $pn \\to pp\\pi^-$ and $pp \\to pp\\pi^0$ reactions have been performed by means of $pd$ collisions at $T_p$ = 1.2 GeV using the WASA detector setup at COSY. Total and differential cross sections have been obtained covering the energy region $T_p = 0.95 - 1.3$ GeV ($\\sqrt s$ = 2.3 - 2.46 GeV), which includes the regions of $\\Delta(1232)$, $N^*(1440)$ and $d^*(2380)$ resonance excitations. From these measurements the isoscalar single-pion production has been extracted, for which data existed so far only below $T_p$ = 1 GeV. We observe a substantial increase "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.07212","kind":"arxiv","version":3},"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/1702.07212/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"}