Determination of the η\toπ^+π^-π^0 Dalitz Plot slopes and asymmetries with the KLOE detector

Details Determination of the η\toπ^+π^-π^0 Dalitz Plot slopes and asymmetries with the KLOE detector Determination of the η\toπ^+π^-π^0 Dalitz Plot slopes and asymmetries with the KLOE detector

2007-07-16

arxiv.org/abs/0707.2355v2

Physics

High Energy Physics

High Energy Physics - Experiment

" Contributed paper to Lepton-Photon 2007 ", 19 pages, 7 figures

Scientific paper

We have studied, with the KLOE detector at the DA$\Phi$NE $\Phi$-Factory, the dynamics of the decay $\eta\to\pi^+\pi^-\pi^0$ using data from the radiative $\phi\to\eta\gamma$ decay for an integrated luminosity $L = 450 \textrm{pb^{-1}}$. From a fit to the Dalitz plot density distribution we obtain a precise measurement of the slope parameters. This should allow to improve the knowledge of the decay amplitude which is sensitive to the u-d quark mass difference. We also present new best results on the C-violating asymmetries in the $\eta\to\pi^+\pi^-\pi^0$ decay.

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