Measurement of the $η\to 3π^{0}$ slope parameter $α$ with the KLOE detector

Details Measurement of the $η\to 3π^{0}$ slope parameter $α$ with the KLOE detector Measurement of the $η\to 3π^{0}$ slope parameter $α$ with the KLOE detector

2010-04-08

arxiv.org/abs/1004.1319v1

Physics

High Energy Physics

High Energy Physics - Experiment

14 pages, 11 figures

Scientific paper

We present a measurement of the slope parameter $\alpha$ for the $\eta\to 3\pi^{0}$ decay, with the KLOE experiment at the DA$\Phi$NE $\phi$-factory, based on a background free sample of $\sim$ 17 millions $\eta$ mesons produced in $\phi$ radiative decays. By fitting the event density in the Dalitz plot we determine $\alpha = -0.0301 \pm 0.0035\,stat\;_{-0.0035}^{+0.0022}\,syst\,$. The result is in agreement with recent measurements from hadro- and photo-production experiments.

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