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Measurement of prominent Ε-decay branching fractions

  • A. Lopez
  • , S. Mehrabyan
  • , H. Mendez
  • , J. Ramirez
  • , J. Y. Ge
  • , D. H. Miller
  • , B. Sanghi
  • , I. P.J. Shipsey
  • , B. Xin
  • , G. S. Adams
  • , M. Anderson
  • , J. P. Cummings
  • , I. Danko
  • , D. Hu
  • , B. Moziak
  • , J. Napolitano
  • , Q. He
  • , J. Insler
  • , H. Muramatsu
  • , C. S. Park
  • E. H. Thorndike, F. Yang, M. Artuso, S. Blusk, S. Khalil, J. Li, N. Menaa, R. Mountain, S. Nisar, K. Randrianarivony, R. Sia, T. Skwarnicki, S. Stone, J. C. Wang, G. Bonvicini, D. Cinabro, M. Dubrovin, A. Lincoln, D. M. Asner, K. W. Edwards, P. Naik, R. A. Briere, T. Ferguson, G. Tatishvili, H. Vogel, M. E. Watkins, J. L. Rosner, N. E. Adam, J. P. Alexander, D. G. Cassel, J. E. Duboscq, R. Ehrlich, L. Fields, R. S. Galik, L. Gibbons, R. Gray, S. W. Gray, D. L. Hartill, B. K. Heltsley, D. Hertz, C. D. Jones, J. Kandaswamy, D. L. Kreinick, V. E. Kuznetsov, H. Mahlke-Krüger, D. Mohapatra, P. U.E. Onyisi, J. R. Patterson, D. Peterson, D. Riley, A. Ryd, A. J. Sadoff, X. Shi, S. Stroiney, W. M. Sun, T. Wilksen, S. B. Athar, R. Patel, J. Yelton, P. Rubin, B. I. Eisenstein, I. Karliner, N. Lowrey, M. Selen, E. J. White, J. Wiss, R. E. Mitchell, M. R. Shepherd, D. Besson, T. K. Pedlar, D. Cronin-Hennessy, K. Y. Gao, J. Hietala, Y. Kubota, T. Klein, B. W. Lang, R. Poling, A. W. Scott, P. Zweber, S. Dobbs, Z. Metreveli, K. K. Seth, A. Tomaradze, J. Ernst, K. M. Ecklund, H. Severini, W. Love, V. Savinov
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Research output: Contribution to journalArticlepeer-review

55 Scopus citations

Abstract

The decay Ï(2S)â†Î•J/Ï is used to measure, for the first time, all prominent Ε-meson branching fractions with the same experiment in the same dataset, thereby providing a consistent treatment of systematics across branching fractions. We present results for Ε decays to ÎÎ, Ï€+Ï€- Ï€0, 3Ï€0, Ï€+Ï€-Î and e+e-Î, accounting for 99.9% of all Ε decays. The precision of several of the branching fractions and their ratios is improved. Two channels, Ï€+Ï€-Î and e+e-Î show results that differ at the level of three standard deviations from those previously determined.

Original languageEnglish
Article number122001
JournalPhysical Review Letters
Volume99
Issue number12
DOIs
StatePublished - Sep 18 2007

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