Measurement of the $e^+e^- \to \pi^0\gamma$ cross section in the energy range 1.075--2 GeV at SND

TL;DR

This paper reports the first measurement of the $e^+e^- o \pi^0\gamma$ cross section in the 1.075 to 2 GeV energy range using the SND detector at VEPP-2000, providing new data in the 1.4-2.0 GeV region.

Contribution

The study provides the first measurements of the $e^+e^- o \pi^0\gamma$ cross section in the 1.4-2.0 GeV range, expanding the understanding of this process at higher energies.

Findings

Measured cross section in 1.075-2 GeV range

First data for 1.4-2.0 GeV energy range

Results contribute to understanding of meson production

Abstract

The process $e^+e^- \to \pi^0\gamma$ is studied with the SND detector at the VEPP-2000 $e^+e^-$ collider. Basing on data with an integrated luminosity of 41 pb$^{-1}$ recorded in 2010-2012 we measure the $e^+e^- \to \pi^0\gamma$ cross section in the center-of-mass energy range from 1.075 up to 2 GeV. In the range 1.4-2.0 GeV the process $e^+e^- \to \pi^0\gamma$ is studied for the first time.