Measurement of omega meson parameters in pi^+pi^-pi^0 decay mode with CMD-2

TL;DR

This study precisely measured the omega meson parameters, including mass, width, and production cross-section, using a large dataset of e+e- collision events in the pi+pi-pi0 decay mode at CMD-2.

Contribution

The paper presents new, high-precision measurements of omega meson parameters in the pi+pi-pi0 decay channel, improving upon previous experimental results.

Findings

Omega meson mass measured as 782.71 MeV/c^2

Omega meson width measured as 8.68 MeV

Production cross-section sigma_0 measured as 1457 nb

Abstract

About 11 200 e^+e^- -> omega -> pi^+pi^-pi^0 events selected in the center of mass energy range from 760 to 810 MeV were used for the measurement of the \omega meson parameters. The following results have been obtained: sigma _{0}=(1457 \pm 23 \pm 19)nb, m_{\omega}=(782.71 \pm 0.07 \pm 0.04) MeV/c^{2}, \Gamma_{\omega}=(8.68 \pm 0.23 \pm 0.10) MeV, \Gamma_{e^+e^-}\cdot Br (\omega -> pi^+pi^-pi^0)= (0.528 \pm 0.012 \pm 0.007) \cdot 10^{-3} MeV.