Scalar Mesons in $\varphi$ Radiative Decay: their implications for spectroscopy and for studies of CP-violation at $\varphi$ factories

F. E. Close, Nathan Isgur, S. Kumano

Existing predictions for the branching ratio for $\varphi \to K\bar{K}\gamma$ {\it via} $\varphi \to S\gamma$ (where $S$ denotes one of the scalar mesons $f_0$(975) and $a_0$(980)) vary by…