{"paper":{"title":"Search for the $\\Theta^{+}$ pentaquark via the $\\pi^-p\\to K^-X$ reaction at 1.92 GeV/$c$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A. Feliciello, A. O. Tokiyasu, A. Sakaguchi, B. Bassalleck, C. J. Yoon, C. W. Joo, E. Botta, F. Hiruma, H. C. Bang, H. Fujioka, H. Noumi, H. Sako, H. Sugimura, H. Takahashi, H. Tamura, K. Aoki, K. Hosomi, K. Imai, K. Itahashi, K. Matsuoka, K. Miwa, K. Ozawa, K. Shirotori, K. Tanida, K. Yagi, K. Yoshida, M. Agnello, M. Ieiri, M. J. Kim, M. Moritsu, M. Naruki, M. Niiyama, M. Sato, M. Sekimoto, M. Ukai, N. Chiga, N. Ishibashi, N. Saito, N. Tomida, P. Evtoukhovitch, R. Honda, R. Iwasaki, R. Kiuchi, S. Adachi, S. Ajimura, S. Bufalino, S. B. Yang, S. Ishimoto, S. J. Kim, S. Marcello, S. Masumoto, S. Sato, S. Sawada, S. Suzuki, T. Koike, T. Nagae, T. N. Takahashi, T. O. Yamamoto, T. Takahashi, T. Tanaka, V. Samoilov, V. V. Kulikov, Y. Ichikawa, Y. Igarashi, Y. Komatsu, Y. Sato, Y. Yonemoto, Z. Tsamalaidze","submitted_at":"2012-03-16T02:30:52Z","abstract_excerpt":"The $\\Theta^+$ pentaquark baryon was searched for via the $\\pi^-p\\to K^-X$ reaction in a missing-mass resolution of 1.4 MeV/$c^2$(FWHM) at J-PARC. $\\pi^-$ meson beams were incident on the liquid hydrogen target with the beam momentum of 1.92 GeV/$c$. No peak structure corresponding to the $\\Theta^+$ mass was observed. The upper limit of the production cross section averaged over the scattering angle of 2$^{\\circ}$ to 15$^{\\circ}$ in the laboratory frame was obtained to be 0.26 $\\mu$b/sr in the mass region of 1.51$-$1.55 GeV/$c^2$.The upper limit of the $\\Theta^+$ decay width using the effectiv"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.3604","kind":"arxiv","version":1},"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"}