Investigation of the $e^+e^- \to \omega \pi^0 \to \pi^0 \pi^0 \gamma$ reaction in the energy domain near the $\phi$-meson

TL;DR

This paper reports on the measurement of the $e^+e^- o ext{omega} ext{pi}^0$ process near the $ ext{phi}$-meson, revealing interference effects and providing amplitude parameters, advancing understanding of meson interactions.

Contribution

The study provides new measurements of the cross-section and interference effects in $e^+e^- o ext{omega} ext{pi}^0$ near the $ ext{phi}$-meson, including amplitude analysis.

Findings

Observed interference effect at three standard deviations.

Measured cross-section parameters and amplitude parts.

Detected $ ext{phi} o ext{pi}^0 ext{pi}^0 ext{gamma}$ decay contribution.

Abstract

The $e^+e^- \to \omega \pi^0 \to \pi^0 \pi^0 \gamma$ process was investigated in the SND experiment at the VEPP-2M collider. A narrow energy interval near the $\phi$-meson was scanned. The observed cross-section reveals, at the level of three standard deviation, the interference effect caused by $\phi \to \pi^0\pi^0\gamma$ decay. The cross-section parameters, as well as the real and imaginary parts of the $\phi$-meson related amplitude, were measured.