{"paper":{"title":"Search for the $\\eta$ mesic $^3$He in the $pd\\rightarrow d p \\pi^{0}$ reaction with the WASA-at-COSY facility","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A. Bondar, A. Erven, A. Goswami, A. Khoukaz, A. Khreptak, A. Kupsc, A. Magiera, A. Roy, A. Szczurek, A. Wronska, A. Yamamoto, B. Kamys, B. Klos, B. Lorentz, B. Marianski, B. Shwartz, 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. Sterzenbach, H. Calen, H. Clement, H. Kleines, H. Ohm, H.-P. Morsch, H. Stockhorst, H. Stroher, I. Ciepal, J. Ritman, J. Smyrski, J. Stepaniak, J. Zabierowski, J. Zlomanczuk, K. Demmich, K. Fohl, K. Fransson, K. Grigoryev, K. Lalwani, K. Pysz, L. Heijkenskjold, M. Bashkanov, M. Berlowski, M. Buscher, M. J. Zielinski, M. Skurzok, M. Wolke, M. Zurek, N. G. Kelkar, N. Husken, N. M. Piskunov, O. Rundel, P. Adlarson, P. Fedorets, P. Kulessa, P. Marciniewski, P. Moskal, P. Wustner, R. Engels, R. Maier, R. Stassen, S. D. Bass, S. Hirenzaki, S. Kistryn, S. Sawant, S. Schadmand, T. Johansson, T. Sefzick, T. Skorodko, V. Hejny, V. Serdyuk, V. Sopov, W. Augustyniak, W. Erven, W. Eyrich, W. Krzemien, W. Parol","submitted_at":"2020-07-30T14:38:57Z","abstract_excerpt":"The excitation function for the $pd\\rightarrow$ $d p \\pi^{0}$ reaction has been measured by WASA-at-COSY experiment with the aim of searching for $^{3}\\hspace{-0.03cm}\\mbox{He}$-$\\eta$ mesic nuclei. The measurement in the vicinity of $\\eta$ meson production was performed using a ramped proton beam. The data analysis and interpretation was carried out with the assumption that the $\\eta$-mesic Helium decays via the formation of an intermediate N$^{*}$(1535) resonance. No direct signal of the $\\eta$-mesic nucleus is observed in the excitation function. We determine a new improved upper limit for "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.15494","kind":"arxiv","version":5},"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/2007.15494/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"}