Search for the θ+ pentaquark via the π-p→K-X reaction at 1.92GeV/c

K. Shirotori, T. N. Takahashi, S. Adachi, M. Agnello, S. Ajimura, K. Aoki, H. C. Bhang, B. Bassalleck, E. Botta, S. Bufalino, N. Chiga, P. Evtoukhovitch, A. Feliciello, H. Fujioka, F. Hiruma, Ryotaro Honda, K. Hosomi, Y. Ichikawa, M. Ieiri, Y. IgarashiK. Imai, N. Ishibashi, S. Ishimoto, K. Itahashi, R. Iwasaki, C. W. Joo, M. J. Kim, S. J. Kim, R. Kiuchi, T. Koike, Y. Komatsu, V. 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. O. Tokiyasu, N. Tomida, Z. Tsamalaidze, M. Ukai, K. Yagi, T. O. Yamamoto, S. B. Yang, Y. Yonemoto, C. J. Yoon, K. Yoshida

研究成果: Article査読

32 被引用数 (Scopus)

抄録

The Θ + pentaquark baryon was searched for via the π -p→K -X reaction with a missing mass resolution of 1.4MeV/c2 (FWHM) at the Japan Proton Accelerator Research Complex (J-PARC). π - meson beams were incident on the liquid hydrogen target with a beam momentum of 1.92GeV/c. No peak structure corresponding to the Θ + 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 0.26μb/sr in the mass region of 1.51-1.55GeV/c2. The upper limit of the Θ + decay width is obtained to be 0.72 and 3.1MeV for JΘP=1/2 + and JΘP=1/2 -, respectively, using the effective Lagrangian approach.

本文言語English
論文番号132002
ジャーナルPhysical review letters
109
13
DOI
出版ステータスPublished - 2012 9 26

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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