Three-body FSIs in D+ ---> K- pi+ pi+

TL;DR

This paper emphasizes the significance of three-body final state interactions in the decay process D+ to K- pi+ pi+, utilizing a Kpi amplitude fitted to elastic scattering data to model phase production.

Contribution

It introduces a model incorporating three-body FSIs with parameters derived from elastic scattering data, providing a detailed description of the decay process.

Findings

Successful modeling of Kpi phase production in the elastic region

Demonstrates the importance of three-body FSIs in D+ decays

Provides parameters for Kpi amplitude based on experimental data

Abstract

We stress the importance of three-body final state interactions in $D^+ \to K^- \p^+ \p^+$. The basic building block is the $K\pi$ amplitude with parameters determined by a fit to elastic LASS data. Based on a vector weak vertex, we can describe the $K\pi$ phase production experimental in the elastic region.