Light Meson Physics from Charm Decays at Fermilab E791 Available to Purchase

We present recent results on light mesons based on Dalitz plot analyses of charm decays from Fermilab experiment E791. Scalar mesons are found to have large contributions to the decays studied, $D+ → K−π+π+$ and D⁺,$Ds+ → π−π+π+$⁠. From the Kππ final state, we find good evidence for the existence of the light and broad κ meson and we measure its mass and width. We also discuss recently published results on the 3π final states, especially the measurement of the f₀ parameters and the evidence for the σ meson from D⁺ → σπ⁺. These results demonstrate the importance of charm decays as a new environment for the study of light meson physics.