Measurement of the K+→π+νν̄ branching ratio

  • S. Adler
  • , V. V. Anisimovsky
  • , M. Aoki
  • , M. Ardebili
  • , A. V. Artamonov
  • , M. Atiya
  • , B. Bassalleck
  • , A. O. Bazarko
  • , B. Bhuyan
  • , E. W. Blackmore
  • , D. A. Bryman
  • , S. Chen
  • , I. H. Chiang
  • , I. A. Christidi
  • , M. R. Convery
  • , P. S. Cooper
  • , M. V. Diwan
  • , J. S. Frank
  • , T. Fujiwara
  • , J. Haggerty
  • J. Hu, T. Inagaki, M. M. Ito, A. P. Ivashkin, D. E. Jaffe, S. Kabe, M. Kazumori, Y. Kuno, M. Kuriki, S. H. Kettell, M. M. Khabibullin, A. N. Khotjantsev, P. Kitching, M. Kobayashi, T. K. Komatsubara, A. Konaka, A. P. Kozhevnikov, Yu G. Kudenko, A. Kushnirenko, L. G. Landsberg, B. Lewis, K. K. Li, L. S. Littenberg, J. A. Macdonald, D. R. Marlow, R. A. McPherson, P. D. Meyers, J. Mildenberger, O. V. Mineev, M. Miyajima, K. Mizouchi, V. A. Mukhin, N. Muramatsu, T. Nakano, M. Nomachi, T. Nomura, T. Numao, V. F. Obraztsov, K. Omata, D. I. Patalakha, S. V. Petrenko, R. Poutissou, E. J. Ramberg, G. Redlinger, T. Sato, T. Sekiguchi, T. Shinkawa, F. C. Shoemaker, A. J.S. Smith, J. R. Stone, R. C. Strand, S. Sugimoto, Y. Tamagawa, R. Tschirhart, T. Tsunemi, D. V. Vavilov, B. Viren, N. V. Yershov, Y. Yoshimura, T. Yoshioka

Research output: Contribution to journalArticlepeer-review

Abstract

Experiment E949 at Brookhaven National Laboratory studied the rare decay K+→π+νν̄ and other processes with an exposure of 1.77×1012 K+'s. The data were analyzed using a blind analysis technique yielding one candidate event with an estimated background of 0.30±0.03 events. Combining this result with the observation of two candidate events by the predecessor experiment E787 gave the branching ratio B(K+→π+νν ̄)=(1.47-0.89+1.30)×10-10, consistent with the standard model prediction of (0.74±0.20)×10-10. This is a more detailed report of results previously published.

Original languageEnglish (US)
Article number052003
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume77
Issue number5
DOIs
StatePublished - Mar 13 2008

All Science Journal Classification (ASJC) codes

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

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