? experiment at KEK12-GeV PS — E391a

M Yamaga,M Dorochenko,T Inagaki,Nobuhiro Ishihara,G Y Lim, Tatsuki Morimoto,H Okuno,Kazumi Omata, Tohru Sato,M Sekimoto,Yumiko Yoshimura, A Ajimura,T Ikei,Yuka Ikemoto,M Nomachi,Tadamichi Oba,K Sakashita,Y Sugaya, Toshiro Yamanaka, Miki Itaya,T Iwata,T Hariu,M Moriya,Youichi Tajima, Masaya Yamamoto,Hidefumi Yoshida, Yuhei Yoshida,A A Lednev,J Nix,G N Perdue,E Pod, M Rawtajizak,Y Wah,Hiroshi Watanabe,Victor Baranov, N Khomouov,A S Kurilin,G Macharashvili,A Moissenko,Z Tsamalaidze,Y Akune, Yoshio Fujioka,N Kawakubo,Shogo Kobayashi, Tetsufumi Kojima,J K Ahn,H S Lee,Sang Yup Lee,T Shinkawa,Y B Hsiung, Takayoshi Nakano

Nuclear Physics A（2003）

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Abstract

The KL → π0ηη decay is one of the most attractive phenomena for the study of the CP violation. The branching ratio can be calculated with a small theoretical ambiguity, which will provide a clean determination of a basic parameter of the present particle physics. It will also play an important role for the search of the new physics as well as for the fundamental unerstanding of the CP-violation. We will start a kind of pilot experiment using a present 12-GeV proton synchrotron (PS) at KEK from early 2004, which is the first dedicated experiment searching for the KL → π0ηη decay.

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Key words

e391a,experiment

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