Comments on ISR method in modern experiment and influence of final state   radiation
  We study the effect of final state radiation in the process $e^++e^- \to \bar p+ p$, in the kinematical conditions of BaBar and BESIII experiment. We show that this effect could be large, in particular in the low $x$ region ($x$ is the photon energy fraction) and should be taken into account. 
E. A. Kuraev, V. V. Bytev, E. Tomasi-Gustafsson and S. Pacetti
hep-ph nucl-th