Generalized Vector Dominance Model up to 2 GeV

TL;DR

This paper demonstrates that the Generalized Vector Dominance Model effectively describes multiple e+e- annihilation processes below 2 GeV with high precision, supporting its use for modeling vector meson interactions.

Contribution

It provides a comprehensive simultaneous description of several processes within GVDM up to 2 GeV, establishing its adequacy and setting the stage for more detailed future studies.

Findings

Model describes processes with less than 6% error.

GVDM effectively models vector meson interactions below 2 GeV.

Supports GVDM as a reliable framework for related processes.

Abstract

The processes $e^+e^-\to \pi^+\pi^-, \omega\pi^0, \eta\pi^+\pi^-, K^+K^-, \pi^+\pi^-\pi^0$ are described simultaneously in the frame of the Generalized Vector Dominance Model (GVDM) allowing model error. The data do not contradict the assumption that the precision of the model we use is not worse than 6\%. This shows that GVDM is an adequate approach to describe processes involving $\rho(770),\omega(787),\phi(1020)$ and their excitations in the energy region below 2 GeV. This work is considered as a first step, next steps should treat more processes and take into account finer effects.