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Search for the decay KL0→3γ

  • Y. C. Tung
  • , Y. B. Hsiung
  • , J. K. Ahn
  • , Y. Akune
  • , V. Baranov
  • , K. F. Chen
  • , M. Doroshenko
  • , Y. Fujioka
  • , T. Inagaki
  • , S. Ishibashi
  • , N. Ishihara
  • , H. Ishii
  • , E. Iwai
  • , T. Iwata
  • , I. Kato
  • , S. Kobayashi
  • , S. Komatsu
  • , T. K. Komatsubara
  • , A. S. Kurilin
  • , E. Kuzmin
  • A. Lednev, H. S. Lee, S. Y. Lee, G. Y. Lim, J. Ma, T. Matsumura, A. Moisseenko, H. Morii, T. Morimoto, Y. Nakajima, T. Nakano, H. Nanjo, N. Nishi, J. Nix, T. Nomura, M. Nomachi, R. Ogata, H. Okuno, K. Omata, G. N. Perdue, S. Perov, S. Podolsky, S. Porokhovoy, K. Sakashita, T. Sasaki, N. Sasao, H. Sato, T. Sato, M. Sekimoto, T. Shimogawa, T. Shinkawa, Y. Stepanenko, Y. Sugaya, A. Sugiyama, T. Sumida, S. Suzuki, Y. Tajima, S. Takita, Z. Tsamalaidze, T. Tsukamoto, Y. Wah, H. Watanabe, M. L. Wu, M. Yamaga, T. Yamanaka, H. Y. Yoshida, Y. Yoshimura, Y. Zheng

Research output: Contribution to journal › Article › peer-review

Abstract

We performed a search for the decay KL0→3γ with the E391a detector at KEK. In the data accumulated in 2005, no event was observed in the signal region. Based on the assumption of KL0→3γ proceeding via parity-violation, we obtained the single event sensitivity to be (3.23±0.14)×10-8, and set an upper limit on the branching ratio to be 7.4×10-8 at the 90% confidence level. This is a factor of 3.2 improvement compared to the previous results. The results of KL0→3γ proceeding via parity-conservation were also presented in this paper.

Original languageEnglish (US)
Article number031101
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume83
Issue number3
DOIs
StatePublished - Feb 2 2011

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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