Study of the process $e^+e^-\to\eta\gamma\to 7\gamma$ in the energy range $\sqrt{s}$ = 1.07 -- 2 GeV

TL;DR

This study measures the cross section of the process $e^+e^- o ext{eta} ext{gamma}$ in the 1.07 to 2 GeV energy range using the SND detector, providing insights into meson production in electron-positron collisions.

Contribution

First measurement of the $e^+e^- o ext{eta} ext{gamma}$ cross section in the 1.07-2 GeV range with detailed analysis of the decay channel $ ext{eta} o 3 ext{pi}^0$.

Findings

Cross section data obtained across the energy range.

Improved understanding of meson production mechanisms.

Data supports theoretical models of $e^+e^-$ annihilation.

Abstract

The $e^+e^-\to\eta\gamma$ cross section is measured in the center-of-mass energy range from 1.07 to 2.00 GeV in the decay channel $\eta\to 3\pi^0$, $\pi^0\to\gamma\gamma$. The data set with an integrated luminosity of 242 pb$^{-1}$ accumulated in the experiment with the SND detector at the VEPP-2000 $e^+e^-$ collider is analyzed.