Search for the rare decayK+→μ+νν¯ν
| Autor: | Yoichi Tamagawa, A. Artamonov, M. Miyajima, J. Hu, Y. Yoshimura, O. V. Mineev, K. Mizouchi, George Redlinger, M. V. Diwan, A. N. Khotjantsev, Yu. G. Kudenko, R. Tschirhart, Takashi Nomura, A. Konaka, T. Fujiwara, Norihito Muramatsu, I-H. Chiang, A. Shaikhiev, P. S. Cooper, R. Poutissou, S. Sugimoto, D. V. Vavilov, D. I. Patalakha, A. O. Izmaylov, L. G. Landsberg, Masaaki Kobayashi, S. Kabe, Ewart W. Blackmore, T. Sato, L. S. Littenberg, I. A. Christidi, T. Sekiguchi, K. Omata, S. H. Kettell, V. Obraztsov, T. Tsunemi, J. Ives, T. Numao, Hanyu Wei, M. M. Khabibullin, J. A. Macdonald, Masaharu Nomachi, B. Bassalleck, Tamaki Yoshioka, B. Viren, Song Chen, N. V. Yershov, B. Lewis, T. Nakano, D. E. Jaffe, K. K. Li, Douglas Bryman, J. Mildenberger, R. C. Strand, T. K. Komatsubara, James Frank, P. Kitching, B. Bhuyan, T. Shinkawa, Zhe Wang |
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| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | Physical Review D. 94 |
| ISSN: | 2470-0029 2470-0010 |
| DOI: | 10.1103/physrevd.94.032012 |
| Popis: | Evidence of the ${K}^{+}\ensuremath{\rightarrow}{\ensuremath{\mu}}^{+}\ensuremath{\nu}\overline{\ensuremath{\nu}}\ensuremath{\nu}$ decay was searched for using E949 (Brookhaven National Laboratory, USA) experimental data with an exposure of $1.70\ifmmode\times\else\texttimes\fi{}1{0}^{12}$ stopped kaons. The data sample is dominated by the background process ${K}^{+}\ensuremath{\rightarrow}{\ensuremath{\mu}}^{+}{\ensuremath{\nu}}_{\ensuremath{\mu}}\ensuremath{\gamma}$. An upper limit on the decay rate $\mathrm{\ensuremath{\Gamma}}({K}^{+}\ensuremath{\rightarrow}{\ensuremath{\mu}}^{+}\ensuremath{\nu}\overline{\ensuremath{\nu}}\ensuremath{\nu})l2.4\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}6}\mathrm{\ensuremath{\Gamma}}({K}^{+}\ensuremath{\rightarrow}\text{all})$ 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 ${\ensuremath{\mu}}^{+}$ spectrum. |
| Databáze: | OpenAIRE |
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