Light quark and charm interplay in the Dalitz-plot analysis of hadronic decays in FOCUS

TL;DR

This paper applies the K-matrix approach to analyze D-meson decays into three pions, highlighting the importance of understanding light-meson interactions for interpreting charm decay dynamics.

Contribution

It introduces the first application of the K-matrix method in the charm sector for Dalitz-plot analysis of D-meson decays.

Findings

Preliminary results on D+ and Ds decays to three pions.

Demonstrates the relevance of scalar meson parametrization.

Highlights the dependence of decay interpretation on light-meson understanding.

Abstract

The potentiality of interpreting the D-meson decay-dynamics has revealed itself to be strongly dependent on our understanding of the light-meson sector. The statistics collected by FOCUS is already at a level that manifests parametrization problems for scalar particles. In this paper the first application of the K-matrix approach in the charm sector is illustrated and preliminary results on the D+ and Ds decays to three pions are shown.