Determination of the Dalitz plot parameter alpha for the decay eta->3pi0 with the Crystal Ball at MAMI-B
Abstract
A precise measurement of the Dalitz plot parameter, alpha, for the eta->3pi0 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*106 eta->3pi0 events were obtained, giving the result alpha = -0.032 +/- 0.002(stat) +/- 0.002(syst).
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