Scalar sigma meson via chiral and crossing dynamics

Abstract

We show that the non-strange scalar $\sigma$ meson, as now reported in the 1996 PDG tables, is a natural consequence of crossing symmetry as well as chiral dynamics for both strong interaction low energy $\pi \pi$ scattering and also $K\to 2\pi$ weak decays.

arXiv commentLatex, 15 pages

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