Study of the Process e+ e- --> omega pi0 --> pi0 pi0 gamma in c.m. Energy Range 920--1380 MeV at CMD-2

TL;DR

This paper measures the cross section of the e+ e- --> omega pi0 --> pi0 pi0 gamma process in the 920-1380 MeV energy range, revealing interference effects between rho mesons and setting limits on related processes.

Contribution

First measurement of the cross section for e+ e- --> omega pi0 --> pi0 pi0 gamma in the specified energy range with analysis of meson interference effects.

Findings

Energy dependence explained by rho(770) and rho'(1450) interference

Upper limits set for e+ e- --> pi0 pi0 gamma and eta pi0 gamma processes

Cross section measurements align with meson decay models

Abstract

The cross section of the process e+ e- --> omega pi0 --> pi0 pi0 gamma has been measured in the c.m. energy range 920-1380 MeV with the CMD-2 detector. Its energy dependence is well described by the interference of the rho(770) and rho'(1450) mesons decaying to omega pi0. Upper limits for the cross sections of the direct processes e+ e- --> pi0 pi0 gamma, eta pi0 gamma have been set.