Recent results from SND detector at VEPP-2M

TL;DR

This paper reports recent experimental results from the SND detector at VEPP-2M, including new decay measurements, cross section data, and improved accuracy of rare light vector meson decays in the 0.4-1.4 GeV energy range.

Contribution

It presents new measurements of meson decay processes, cross sections, and analysis based on the full dataset, advancing understanding of light vector meson behaviors.

Findings

First observation of $ ho\to\pi^0\pi^0\gamma$ decay

Improved accuracy of $ ext{omega}\to\pi^0\pi^0\gamma$ decay measurement

Measured cross sections for $e^+e^-\to\omega\pi^0$ and $e^+e^-\to\pi^+\pi^-\pi^0$

Abstract

The current status of experiments with SND detector at VEPP-2M $e^+e^-$ collider in the energy range $2E_0=0.4-1.4$ GeV is given. The new results of analysis of $\phi$ decay into $\pi^0\pi^0\gamma$, $\eta\pi^0\gamma$ are based on the full SND statistics corresponding 20 million of $\phi$ decay. New measurement of $\omega\to\pi^0\pi^0\gamma$ decay and a first observation of $\rho\to\pi^0\pi^0\gamma$ are presented. The accuracy of many other rare decays of light vector mesons was improved. In the energy range $2E_0=1.0\div1.4$ GeV the cross sections of the processes $e^+e^-\to\omega\pi^0$ and $e^+e^-\to\pi^+\pi^-\pi^0$ were measured. The results of the fitting of data are discussed.