The Present Status on sigma and kappa Meson Properties

Details The Present Status on sigma and kappa Meson Properties The Present Status on sigma and kappa Meson Properties

2002-12-29

arxiv.org/abs/hep-ph/0212383v1

Prog.Theor.Phys.Suppl.149:190-202,2003

Physics

High Energy Physics

High Energy Physics - Phenomenology

draft of the proceedings of "Chiral' 02" in Kyoto, Oct 2002

Scientific paper

10.1143/PTPS.149.190

The recent experimental data of both pipi / Kpi scattering and production processes, suggesting the existence of scalar sigma and kappa mesons, are reviewed. In many pipi /Kpi production processes the direct effects of their productions are observed, while they are, because of chiral symmetry, hidden in scattering processes, and now sigma(500--600) and kappa(800--900) are considered to be confirmed experimentally. The recent criticism on our method of analyses, which is based on the long believed prejudice of universal pipi / Kpi phase through scattering and production amplitudes, is explained not to be valid.

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