Stability of the Zagreb Carnegie-Mellon-Berkeley model

TL;DR

This paper demonstrates that the Zagreb CMB coupled-channel model reliably predicts pole positions in partial wave data, maintaining stability despite significant variations in model assumptions.

Contribution

It provides an analysis of the stability of the Zagreb CMB model, confirming its robustness in extracting pole positions from complex data.

Findings

The Zagreb CMB model is stable under various model assumptions.

The method reliably predicts pole positions from partial wave data.

Model variations do not significantly affect the pole extraction results.

Abstract

In ref. [1] we have used the Zagreb realization of Carnegie-Melon-Berkeley coupled-channel, unitary model as a tool for extracting pole positions from the world collection of partial wave data, with the aim of eliminating model dependence in pole-search procedures. In order that the method is sensible, we in this paper discuss the stability of the method with respect to the strong variation of different model ingredients. We show that the Zagreb CMB procedure is very stable with strong variation of the model assumptions, and that it can reliably predict the pole positions of the fitted partial wave amplitudes.