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

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

2008-01-17

arxiv.org/abs/0801.2642v2

JHEP 0805:006,2008

Physics

High Energy Physics

High Energy Physics - Experiment

15 pages, 7 figures

Scientific paper

10.1088/1126-6708/2008/05/006

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 $\eta$ mesons from the decay $\phi\to\eta\gamma$ for an integrated luminosity ${\mathcal L}$ = 450 pb$^{-1}$. From a fit to the Dalitz plot density distribution we obtain a precise measurement of the slope parameters. An alternative parametrization relates the $\pi^+\pi^-\pi^0$ slopes to that for $\eta\to 3\pi^0$ showing the consistency of KLOE results for both channels. We also obtain the best confirmation of the $C$-invariance in the $\eta\to\pi^+\pi^-\pi^0$ decay.

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