Measurements of the Branching Fractions of the Singly-Cabibbo-Suppressed Decays $D^0\to\omega\eta$, $\eta^{(\prime)}\pi^0$ and $\eta^{(\prime)}\eta$

TL;DR

This paper reports precise measurements of several singly-Cabibbo-suppressed decay branching fractions of the D^0 meson, including the first measurement of D^0→ωη, using data from the BESIII detector at 3.773 GeV.

Contribution

First measurement of the D^0→ωη branching fraction and improved precision for D^0→ηη decays, enhancing understanding of charm meson decay processes.

Findings

Measured branching fraction of D^0→ωη for the first time.

Achieved more precise measurement of D^0→ηη branching fraction.

Provided data to test theoretical models of charm decays.

Abstract

By analyzing a data sample of 2.93 fb$^{-1}$ collected at $\sqrt s=$ 3.773 GeV with the BESIII detector operated at the BEPCII storage rings, we measure the branching fractions ${\mathcal B}(D^0\to\omega\eta)=(2.15\pm0.17_{\rm stat.}\pm0.15_{\rm sys.})\times 10^{-3}$, ${\mathcal B}(D^0\to\eta\pi^0)=(0.58\pm0.05_{\rm stat.}\pm0.05_{\rm sys.})\times 10^{-3}$, ${\mathcal B}(D^0\to\eta^\prime\pi^0)=(0.93\pm0.11_{\rm stat.}\pm0.09_{\rm sys.})\times 10^{-3}$, ${\mathcal B}(D^0\to\eta\eta)=(2.20\pm0.07_{\rm stat.}\pm0.06_{\rm sys.})\times 10^{-3}$ and ${\mathcal B}(D^0\to\eta^\prime\eta)=(0.94\pm0.25_{\rm stat.}\pm0.11_{\rm sys.})\times 10^{-3}$. We note that ${\mathcal B}(D^0\to \omega\eta)$ is measured for the first time and that ${\mathcal B}(D^0\to \eta\eta)$ is measured with much improved precision.