Search for Pentaquark Theta super(+) in Hadronic Reaction at J-PARC

The first experiment at the J-PARC hadron facility, the J-PARC E19 experiment, aims at searching for the Theta super(+) pentaquark in the hadronic reaction pi super(-) p arrow right K super(-) X using the missing-mass technique. Based on a superconducting magnet excited at 2.5 T, the spectrometer ac...

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Veröffentlicht in:	Few-body systems 2013-08, Vol.54 (7-10), p.955-960
Hauptverfasser:	Naruki, M, Adachi, S, Agnello, M, Ajimura, S, Aoki, K, Bang, H, Bassalleck, B, Botta, E, Bufalino, S, Ekawa, H, Evtoukhovitch, P, Feliciello, A, Fujioka, H, Hayakawa, S, Hiruma, F, Honda, R, Hosomi, K, Ichikawa, Y, Ieiri, M, Igarashi, Y, Imai, K, Ishibashi, N, Ishimoto, S, Itahashi, K, Iwasaki, R, Joo, G G, Kanatsuki, S, Kim, MJ, Kim, S J, Kiuchi, R, Koike, T, Komatsu, Y, Kulikov, V V, Marcello, S, Masumoto, S, Matsumoto, Y, Matsuoka, K, Miwa, K, Moritsu, M, Nagae, T, Niiyama, M, Noumi, H, Nozawa, Y, Ota, R, Ozawa, K, Saito, N, Sakaguchi, A, Sako, H, Samoilov, V, Sato, M, et. al
Format:	Artikel
Sprache:	eng
Schlagworte:	Autumn
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Zusammenfassung:	The first experiment at the J-PARC hadron facility, the J-PARC E19 experiment, aims at searching for the Theta super(+) pentaquark in the hadronic reaction pi super(-) p arrow right K super(-) X using the missing-mass technique. Based on a superconducting magnet excited at 2.5 T, the spectrometer achieved the high mass resolution of 1.4 MeV/c super(2) for the Theta super(+) production process. The first data taking was performed in the autumn of 2010. No significant structure was observed in the missing-mass spectrum. The upper limit obtained for the differential cross section is 0.26 mu b/sr in the laboratory frame at a 90 % CL.
ISSN:	0177-7963 1432-5411
DOI:	10.1007/s00601-013-0685-2