First search for KL→π0π0νν̄

J. Nix, J. K. Ahn, Y. Akune, V. Baranov, M. Doroshenko, Y. Fujioka, Y. B. Hsiung, T. Inagaki, S. Ishibashi, N. Ishihara, H. Ishii, E. Iwai, T. Iwata, S. Kobayashi, T. K. Komatsubara, A. S. Kurilin, E. Kuzmin, A. Lednev, H. S. Lee, S. Y. LeeG. Y. Lim, T. Matsumura, A. Moisseenko, H. Morii, T. Morimoto, T. Nakano, T. Nomura, M. Nomachi, H. Okuno, K. Omata, G. N. Perdue, S. Perov, S. Podolsky, S. Porokhovoy, K. Sakashita, N. Sasao, H. Sato, T. Sato, M. Sekimoto, T. Shinkawa, Y. Sugaya, A. Sugiyama, T. Sumida, Y. Tajima, Z. Tsamalaidze, T. Tsukamoto, Y. Wah, H. Watanabe, M. Yamaga, T. Yamanaka, H. Y. Yoshida, Y. Yoshimura

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


The first search for the rare kaon decay KL→π0π0νν̄ has been performed by the E391a collaboration at the KEK 12-GeV proton synchrotron. An upper limit of 4.7×10-5 at the 90% confidence level was set for the branching ratio of the decay KL→π0π0νν̄ using about 10% of the data collected during the first period of data taking. First limits for the decay mode KL→π0π0P, where P is a pseudoscalar particle, were also set.

Original languageEnglish
Article number011101
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number1
Publication statusPublished - 2007 Jul 6
Externally publishedYes

ASJC Scopus subject areas

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


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