Measurement of the slope parameter for the eta -> 3 pi(0) decay in the pp -> pp eta reaction

M. Bashkanov*, D. Bogoslawsky, H. Calen, F. Capellaro, H. Clement, L. Demiroers, C. Ekstrom, K. Fransson, L. Gustafsson, B. Hoistad, G. Ivanov, M. Jacewicz, E. Jiganov, T. Johansson, S. Keleta, I. Koch, S. Kullander, A. Kupsc, A. Kuznetsov, P. MarciniewskiR. Meier, B. Morosov, W. Oelert, C. Pauly, Y. Petukhov, H. Pettersson, A. Povtorejko, R. J. M. Y. Ruber, K. Schonning, W. Scobel, T. Skorodko, B. Shwartz, V. Sopov, J. Stepaniak, V. Tchernyshev, P. Thoerngren Engblom, V. Tikhomirov, A. Turowiecki, G. J. Wagner, U. Wiedner, M. Wolke, A. Yamamoto, J. Zabierowski, J. Zlomanczuk

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The CELSIUS-WASA setup is used to measure the 3 pi(0) decay of eta mesons produced in pp interactions with beam kinetic energies of 1.36 and 1.45 GeV. The efficiency-corrected Dalitz plot and density distributions for this decay are shown, together with a fit of the quadratic slope parameter alpha yielding alpha = -0.026 +/- 0.010(stat) +/- 0.010(syst). This value is compared to recent experimental results and theoretical predictions.

Original languageEnglish
Article number048201
Number of pages4
JournalPhysical Review C
Issue number4
Publication statusPublished - 3 Oct 2007


  • PI
  • ETA->3-PI


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