Cross section measurements of the processes $e^+e^- \rightarrow \omega\pi^{0}$ and $\omega\eta$ at center-of-mass energies between 3.773 and 4.701 GeV

TL;DR

This study measures the cross sections of specific e+e- annihilation processes into omega-pi0 and omega-eta at energies between 3.773 and 4.701 GeV, finding no significant resonance contributions and suggesting small branching fractions for these resonances.

Contribution

First precise measurement of these cross sections over a wide energy range, with analysis indicating a simple continuum process and minimal resonance effects.

Findings

Cross sections follow an $s^{-n}$ dependence.

No significant resonance contributions detected.

Resonances have small branching fractions into the studied final states.

Abstract

The Born cross sections of the processes $e^+e^- \rightarrow \omega\pi^{0}$ and $e^+e^- \rightarrow \omega\eta$ are measured at center-of-mass energies between 3.773 and 4.701 GeV using a total integrated luminosity of 22.7 fb$^{-1}$ collected with the BESIII detector operating at the BEPCII collider. A simple $s^{-n}$ dependence for the continuum process can describe the measured Born cross sections. No significant contributions from the $\psi(4160)$, $Y(4230)$, $Y(4360)$, $\psi(4415)$, $Y(4660)$ resonances are found, which indicates relative small branching fractions for these resonances into the $\omega\pi^{0}$ and $\omega\eta$ final states.