Search for Pentaquark Θ+ in Hadronic Reaction at J-PARC

  • M. Naruki
  • , S. Adachi
  • , M. Agnello
  • , S. Ajimura
  • , K. Aoki
  • , H. Bang
  • , B. Bassalleck
  • , E. Botta
  • , S. Bufalino
  • , H. Ekawa
  • , P. Evtoukhovitch
  • , A. Feliciello
  • , H. Fujioka
  • , S. Hayakawa
  • , F. Hiruma
  • , R. Honda
  • , K. Hosomi
  • , Y. Ichikawa
  • , M. Ieiri
  • , Y. Igarashi
  • K. Imai, N. Ishibashi, S. Ishimoto, K. Itahashi, R. Iwasaki, G. G. Joo, S. Kanatsuki, M. J. Kim, S. J. Kim, R. Kiuchi, T. Koike, Y. Komatsu, V. V. Kulikov, S. Marcello, S. Masumoto, Y. Matsumoto, K. Matsuoka, K. Miwa, M. Moritsu, T. Nagae, M. Niiyama, H. Noumi, Y. Nozawa, R. Ota, K. Ozawa, N. Saito, A. Sakaguchi, H. Sako, V. Samoilov, M. Sato, S. Sato, Y. Sato, S. Sawada, M. Sekimoto, K. Shirotori, H. Sugimura, S. Suzuki, T. N. Takahashi, 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

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

The first experiment at the J-PARC hadron facility, the J-PARC E19 experiment, aims at searching for the Θ+ pentaquark in the hadronic reaction π- p → K- 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/c2 for the Θ+ 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 μb/sr in the laboratory frame at a 90 % CL.

Original languageEnglish
Pages (from-to)955-960
Number of pages6
JournalFew-Body Systems
Volume54
Issue number7-10
DOIs
StatePublished - Aug 2013

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