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Landsberg, L.S. Littenberg, M. Kobayashi, M. Miyajima, M.M. Khabibullin, M. Nomachi, M.V. Diwan, N. Muramatsu, N.V. Yershov, O.V. Mineev, P. Kitching, P.S. Cooper, R.C. Strand, R. Poutissou, R. Tschirhart, S. Chen, S.H. Kettell, S. Kabe, S. Sugimoto, S.V. Petrenko, T. Fujiwara, T.K. Komatsubara, T. Nakano, T. Nomura, T. Numao, T. Sato, T. Sekiguchi, T. Shinkawa, T. Tsunemi, T. Yoshioka, V.A. Mukhin, V.F. Obraztsov, Y. Tamagawa, Yu.G. Kudenko, Y. Yoshimura, Zhe Wang","submitted_at":"2009-02-28T01:22:46Z","abstract_excerpt":"Experiment E949 at Brookhaven National Laboratory has observed three new events consistent with the decay K+ => pi+,nu,nubar in the pion momentum region 140 < P_pi < 199 MeV/c in an exposure of 1.71e12 stopped kaons with an estimated total background of 0.93+-0.17(stat.)+0.32-0.24(syst.) events. This brings the total number of observed K+ => pi+,nu,nubar events to seven. 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