Evidence for Light Scalar Resonances in Charm Meson Decays from Fermilab   E791

A. J. Schwartz

arXiv:hep-ex/0212057·hep-ex·August 23, 2017

Evidence for Light Scalar Resonances in Charm Meson Decays from Fermilab E791

A. J. Schwartz

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TL;DR

This paper presents evidence for light scalar resonances sigma(500) and kappa(800) in charm meson decays, and measures properties of f_0 resonances, advancing understanding of scalar mesons in particle physics.

Contribution

It provides experimental evidence for light scalar mesons in charm decays and measures their properties using Dalitz-plot analyses, which is a novel application in this context.

Findings

01

Evidence for sigma(500) and kappa(800) in charm decays

02

Measured masses and widths of f_0(980) and f_0(1370)

03

Enhanced understanding of light scalar mesons

Abstract

From Dalitz-plot analyses of $D^{+} \to π^{-} π^{+} π^{+}$ and $D^{+} \to K^{-} π^{+} π^{+}$ decays, we find evidence for light and broad scalar resonances sigma(500) and kappa(800). From a Dalitz-plot analysis of $D_{s}^{+} \to π^{-} π^{+} π^{+}$ decays, we measure the masses and decay widths of the scalar resonances f_0(980) and f_0(1370).

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Taxonomy

TopicsParticle physics theoretical and experimental studies · Quantum Chromodynamics and Particle Interactions · Nuclear physics research studies