Measurement of the eta -> pi(+)pi(-)e(+)e(-) decay branching ratio

null, null, Chr. Bargholtz, M. Bashkanov, D. Bogoslawsky, H. Calen, F. Cappellaro, H. Clement, L. Demiroers, C. Ekstrom, K. Fransson, L. Geren, L. Gustafsson, B. Hoistad, G. Ivanov, M. Jacewicz*, E. Jiganov, T. Johansson, S. Keleta, I. Koch, S. KullanderA. Kupsc, A. Kuznetsov, I. V. Laukhin, K. Lindberg, P. Marciniewski, R. Meier, B. Morosov, W. Oelert, C. Pauly, H. Pettersson, Y. Petukhov, A. Povtorejko, R. J. M. Y. Ruber, K. Schonning, W. Scobel, R. Shafigullin, B. Shwartz, T. Skorodko, V. Sopov, J. Stepaniak, V. Tchernyshev, P. -E. Tegner, P. Thorngren Engblom, V. Tikhomirov, A. Turowiecki, G. J. Wagner, M. Wolke, A. Yamamoto, J. Zabierowski, I. Zartova, J. Zlomanczuk

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The reaction pd -> He-3 eta at threshold was used to provide a clean source of eta mesons for decay studies with the WASA detector at CELSIUS. The branching ratio of the decay eta -> pi(+)pi(-)e(+)e(-) is measured to be (4.3 +/- 1.3 +/- 0.4) x 10(-4). (c) 2006 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)299-303
Number of pages5
JournalPhysics Letters B
Volume644
Issue number5-6
DOIs
Publication statusPublished - 25 Jan 2007

Keywords

  • eta meson decays
  • dalitz decays
  • CONVERSION DECAYS
  • CP VIOLATION
  • THRESHOLD
  • ETA
  • ETA->PI(+)PI(-)E(+)E(-)
  • DETECTOR
  • MESONS

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