{"paper":{"title":"Search for the deeply bound $K^-pp$ state from the semi-inclusive forward-neutron spectrum in the in-flight $K^-$ reaction on helium-3","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"Akihisa Toyoda, Alessandro Scordo, Antonio Romero Vidal, Atsushi Sakaguchi, Carlo Guaraldo, Catalina Curceanu, Dai Tomono, Diana Sirghi, Diego Faso, Eberhard Widmann, Florin Sirghi, Fuminori Sakuma, George Beer, Haruhiko Outa, Heejoong Yim, Hexi Shi, Hideyuki Tatsuno, Hiroaki Ohnishi, Hiroshi Kou, Hiroyuki Fujioka, Hiroyuki Noumi, Hyoungchan Bhang, Johann Marton, Johann Zmeskal, Kenta Itahashi, Kentaro Inoue, Kiyoshi Tanida, Kristian Piscicchia, Kyo Tsukada, Luigi Busso, Makoto Tokuda, Marco Poli Lener, Mario Bragadireanu, Masaaki Iwai, Masaharu Sato, Masahiko Iwasaki, Masami Iio, Michael Cargnelli, Michiko Sekimoto, Mihai Iliescu, Ombretta Morra, Oton Vazquez Doce, Paul Kienle, Qi Zhang, Ryugo S. Hayano, Seonho Choi, Shigeru Ishimoto, Shingo Kawasaki, Shinji Okada, Shoji Suzuki, Shuhei Ajimura, Shun Enomoto, Tadashi Hashimoto, Takashi Ishikawa, Takatoshi Suzuki, Takumi Yamaga, Tomofumi Nagae, Tomokazu Fukuda, Toshihiko Hiraiwa, Toshimitsu Yamazaki, Yasuyuki Matsuda, Yosuke Ishiguro, Yue Ma, Yuko Kato, Yutaka Mizoi, Yuta Sada, Yuya Fujiwara","submitted_at":"2014-08-24T21:29:14Z","abstract_excerpt":"An experiment to search for the $K^-pp$ bound state was performed via the in-flight $^3$He($K^-,n)$ reaction using 5.3 $\\times$ $10^9$ kaons at 1 GeV/$c$ at the J-PARC hadron experimental facility. In the semi-inclusive neutron missing-mass spectrum at $\\theta_{n}^{lab}=0^\\circ$, no significant peak was observed in the region corresponding to $K^-pp$ binding energy larger than 80 MeV, where a bump structure has been reported in the $\\Lambda p$ final state in different reactions. Assuming the state to be isotropically decaying into $\\Lambda p$, mass-dependent upper limits on the production cros"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1408.5637","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"}