Measurement of the slope parameter αfor the η\to 3π^0 decay at KLOE

Details Measurement of the slope parameter αfor the η\to 3π^0 decay at KLOE Measurement of the slope parameter αfor the η\to 3π^0 decay at KLOE

2007-07-27

arxiv.org/abs/0707.4137v1

Physics

High Energy Physics

High Energy Physics - Experiment

" Contributed paper to Lepton-Photon 2007 ". 5 pages, 4 figures

Scientific paper

We report a preliminary measurement of the slope parameter $\alpha$ for the $\eta\to 3\piz$ decay carried out with KLOE at DA$\Phi$NE; where $\alpha$ is the parameter describing the energy dependence of the square of the matrix element for this decay. By fitting the event density in the Dalitz plot with a collected statistic of 420 pb$^{-1}$ we determine $\alpha = -0.027 \pm 0.004 (stat) ^{+0.004}_{-0.006} (syst)$. This result is consistent with current chiral perturbation theory calculations within the unitary approach.

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