Data di Pubblicazione:
2012
Abstract:
The Theta^{+} pentaquark baryon was searched for via the pi^{-}pK^{-}X reaction with a missing mass resolution of 1.4MeV/c^{2} (FWHM) at the Japan Proton Accelerator Research Complex (J-PARC). pi^{-} meson beams were incident on the liquid hydrogen target with a beam momentum of 1.92GeV/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° to 15° in the laboratory frame is obtained to be 0.26mub/sr in the mass region of 1.51-1.55GeV/c^{2}. The upper limit of the Theta^{+} decay width is obtained to be 0.72 and 3.1MeV for J_{Theta}^{P}=1/2^{+} and J_{Theta}^{P}=1/2^{-}, respectively, using the effective Lagrangian approach.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
pentaquark
Elenco autori:
K. Shirotori;T. Takahashi;S. Adachi;M. Agnello;S. Ajimura;K. Aoki;H. Bhang;B. Bassalleck;E. Botta;S. Bufalino;N. Chiga;P. Evtoukhovitch;A. Feliciello;H. Fujioka;F. Hiruma;R. Honda;K. Hosomi;Y. Ichikawa;M. Ieiri;Y. Igarashi;K. Imai;N. Ishibashi;S. Ishimoto;K. Itahashi;R. Iwasaki;C. Joo;M. Kim;S. Kim;R. Kiuchi;T. Koike;Y. Komatsu;V. Kulikov;S. Marcello;S. Masumoto;K. Matsuoka;K. Miwa;M. Moritsu;T. Nagae;M. Naruki;M. Niiyama;H. Noumi;K. Ozawa;N. Saito;A. Sakaguchi;H. Sako;V. Samoilov;M. Sato;S. Sato;Y. Sato;S. Sawada;M. Sekimoto;H. Sugimura;S. Suzuki;H. Takahashi;T. Takahashi;H. Tamura;T. Tanaka;K. Tanida;A. Tokiyasu;N. Tomida;Z. Tsamalaidze;M. Ukai;K. Yagi;T. Yamamoto;S. Yang;Y. Yonemoto;C. Yoon;K. Yoshida
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