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Light Mesons from Charm Meson Decays in FNAL E791

Brian T. Meadows
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Abstract

An analysis of the Dalitz plots for the decays $D^+\to K^-π^+π^+$ and $D^+\toπ^-π^+π^+$ indicates that structure with significant phase variation is required in the s-wave $K^-π^+$ and $π^-π^+$ systems in the region below 1 GeV/c$^2$ effective mass. A constant, non resonant "contact" term, together with a simple s-wave Breit Wigner amplitude with $M_{0}=797\pm 19\pm 43, Γ_{0}= 175\pm 12\pm 12$ MeV/c$^2$ for the $\Km\pip$ system and $M_{0}=478^{+24}_{-23}\pm 17, Γ_{0}=324^{+42}_{-40}\pm 21$ MeV/c$^2$ for the $π^-π^+$ system provide good fits to the data in this region.

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Brian T. Meadows. 2002-08-29. Light Mesons from Charm Meson Decays in FNAL E791. https://arxiv.org/abs/hep-ex/0208049

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