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. ParkE. 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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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 (US)
Article number122001
JournalPhysical Review Letters
Volume99
Issue number12
DOIs
StatePublished - Sep 18 2007

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Lopez, A., Mehrabyan, S., Mendez, H., Ramirez, J., Ge, J. Y., Miller, D. H., Sanghi, B., Shipsey, I. P. J., Xin, B., Adams, G. S., Anderson, M., Cummings, J. P., Danko, I., Hu, D., Moziak, B., Napolitano, J., He, Q., Insler, J., Muramatsu, H., ... Savinov, V. (2007). Measurement of prominent Ε-decay branching fractions. Physical Review Letters, 99(12), [122001]. https://doi.org/10.1103/PhysRevLett.99.122001