Light Scalar Mesons $σ(500)$, $f_0(980)$ and $κ$ in Charm Meson Decays

Details Light Scalar Mesons $σ(500)$, $f_0(980)$ and $κ$ in Charm Meson Decays Light Scalar Mesons $σ(500)$, $f_0(980)$ and $κ$ in Charm Meson Decays

2002-08-23

arxiv.org/abs/hep-ex/0208039v1

Physics

High Energy Physics

High Energy Physics - Experiment

10 pages, 2 figures. To appear in proceedings of VIII International Workshop on Hadron Physics 2002 Rio Grande do Sul, Brazil.

Scientific paper

We present recent results on scalar 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, $D^+\to K^-\pi^+\pi^+$ and $D^+, D_s^+\to\pi^-\pi^+\pi^+$. From the first decay, we find good evidence for the existence of the light and broad $\kappa$ meson and we measure its mass and width. We find strong evidence for the $\sigma(500)$ meson from $D^+\to\pi^-\pi^+\pi^+$ decay and measure its mass and width. We also present the results obtained for the $f_0(980)$ parameters through the $D^+_s \to\pi^-\pi^+\pi^+$ decay. These results demonstrate the importance of charm decays as a new environment for the study of light meson physics.

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