Determination of the Dalitz plot parameter alpha for the decay   eta->3pi^0 with the Crystal Ball at MAMI-B
  A precise measurement of the Dalitz plot parameter, alpha, for the eta->3pi^0 decay is presented. The experiment was performed with the Crystal Ball and TAPS large acceptance photon detectors at the tagged photon beam facility of the MAMI-B electron accelerator in Mainz. High statistics of 1.8*10^6 eta->3pi^0 events were obtained, giving the result alpha = -0.032 +/- 0.002(stat) +/- 0.002(syst). 
M. Unverzagt, P. Aguar-Bartolome, J. Ahrens, J.R.M. Annand, H.J.   Arends, R. Beck, V. Bekrenev, B. Boillat, A. Braghieri, D...