Observation of the isospin-violating decay $J/\psi \to \varphi {\pi }^0{f}_0(980)$

BESIII Collaboration, M. Ablikim, M. N. Achasov +410

Using a sample of 1.31 billion $J/\psi$ events collected with the BESIII detector at the BEPCII collider, the decays $J/\psi \to \varphi {\pi }^{+}{\pi }^{-}{\pi }^0$ and $J/\psi \to \varphi {\pi }^0{\pi }^0{\pi }^0$ are invest…