학술논문
Search for the rare decay $K^+\to\mu^+\nu\bar\nu\nu$
Document Type
Working Paper
Author
Artamonov, A. V.; Bassalleck, B.; Bhuyan, B.; Blackmore, E. W.; Bryman, D. A.; Chen, S.; Chiang, I-H.; Christidi, I. -A.; Cooper, P. S.; Diwan, M. V.; Frank, J. S.; Fujiwara, T.; Hu, J.; Ives, J.; Izmaylov, A. O.; Jaffe, D. E.; Kabe, S.; Kettell, S. H.; Khabibullin, M. M.; Khotjantsev, A. N.; Kitching, P.; Kobayashi, M.; Komatsubara, T. K.; Konaka, A.; Kudenko, Yu. G.; Landsberg, L. G.; Lewis, B.; Li, K. K.; Littenberg, L. S.; Macdonald, J. A.; Mildenberger, J.; Mineev, O. V.; Miyajima, M.; Mizouchi, K.; Muramatsu, N.; Nakano, T.; Nomachi, M.; Nomura, T.; Numao, T.; Obraztsov, V. F.; Omata, K.; Patalakha, D. I.; Poutissou, R.; Redlinger, G.; Sato, T.; Sekiguchi, T.; Shaikhiev, A. T.; Shinkawa, T.; Strand, R. C.; Sugimoto, S.; Tamagawa, Y.; Tschirhart, R.; Tsunemi, T.; Vavilov, D. V.; Viren, B.; Wang, Zhe; Wei, Hanyu; Yershov, N. V.; Yoshimura, Y.; Yoshioka, T.
Source
Phys. Rev. D 94, 032012 (2016)
Subject
Language
Abstract
Evidence of the $K^+\to\mu^+\nu\bar\nu\nu$ decay was searched for using E949 experimental data with an exposure of $1.70\times 10^{12}$ stopped kaons. The data sample is dominated by the backgrond process $K^+\to\mu^+\nu_\mu\gamma$. An upper limit on the decay rate $\Gamma(K^+\to\mu^+\nu\bar\nu\nu)< 2.4\times 10^{-6}\Gamma(K^+\to all)$ at 90% confidence level was set assuming the Standard Model muon spectrum. The data are presented in such a way as to allow calculation of rates for any assumed $\mu^+$ spectrum.
Comment: 7 pages, 5 figures
Comment: 7 pages, 5 figures