Isospin violation in $\varphi ,J/\psi ,{\psi }^{\prime }\to \omega {\pi }^0$ via hadronic loops

Gang Li, Qiang Zhao, Bing-Song Zou

In this work, we study the isospin-violating decay of $\varphi \to \omega {\pi }^0$ and quantify the electromagnetic (EM) transitions and intermediate meson exchanges as two major sources of the dec…