$ππ$ scattering S wave from the data on the reaction $π^-p\toπ^0π^0n$

Details $ππ$ scattering S wave from the data on the reaction $π^-p\toπ^0π^0n$ $ππ$ scattering S wave from the data on the reaction $π^-p\toπ^0π^0n$

2003-02-25

arxiv.org/abs/hep-ph/0302220v1

Phys.Rev. D67 (2003) 114018

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, 5 figures

Scientific paper

10.1103/PhysRevD.67.114018

The results of the recent experiments on the reaction $\pi^-p\to\pi^0\pi^0n$ performed at KEK, BNL, IHEP, and CERN are analyzed in detail. For the I=0 $\pi\pi$ S wave phase shift $\delta^0_0$ and inelasticity $\eta^0_0$ a new set of data is obtained. Difficulties emerging when using the physical solutions for the $\pi^0\pi^0$ S and D wave amplitudes extracted with the partial wave analyses are discussed. Attention is drawn to the fact that, for the $\pi^0\pi^0$ invariant mass, m, above 1 GeV, the other solutions, in principle, are found to be more preferred. For clarifying the situation and further studying the $f_0(980)$ resonance thorough experimental investigations of the reaction $\pi^-p\to\pi^0\pi^0n$ in the m region near the $K\bar K$ threshold are required.

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