Properties of the light scalar mesons face the experimental data on the $φ\toπ^0π^0γ$ decay and the $ππ$ scattering

Details Properties of the light scalar mesons face the experimental data on the $φ\toπ^0π^0γ$ decay and the $ππ$ scattering Properties of the light scalar mesons face the experimental data on the $φ\toπ^0π^0γ$ decay and the $ππ$ scattering

2005-12-03

arxiv.org/abs/hep-ph/0512047v3

Phys.Rev.D73:054029,2006; Erratum-ibid.D74:059902,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

A few typos are removed. 1) In Eq. (19) D_\rho(m_{\rho}) and D_\rho(m^*_{\rho}) are replaced by D_\rho(\tilde{m}_{\rho}) and

Scientific paper

10.1103/PhysRevD.73.054029

The high-statistical KLOE data on the $\phi\to\pi^0\pi^0\gamma$ decay are described simultaneously with the data on $\pi\pi$ scattering and the $\pi\pi\to K\bar K$ reaction. The description is carried out taking into account the chiral shielding of the putative $\sigma (600)$ meson and it's mixing with the well-established $f_0(980)$ meson. It is shown that the data don't contradict the existence of the $\sigma (600)$ meson and yield evidence in favor of the four-quark nature of the $\sigma (600)$ and $f_0(980)$ mesons.

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