Measurement of the Slope Parameter for the eta->3pi0 Decay in the pp->pp eta Reaction

Abstract

The CELSIUS/WASA setup is used to measure the 3pi0 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.

4 pages, 7 Postscript figures, uses revtex4.sty

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• Measurement of the $\eta \to {\pi }^{+}{\pi }^{-}{\pi }^0$ Dalitz plot distribution
• $\eta$ and ${\eta }^{\prime }$ Physics at BES-III
• Patterns of $C$- and $CP$-violation in hadronic $\eta$ and ${\eta }^{\prime }$ three-body decays
• Status of Strong ChPT
• Eta and Eta' physics