Аннотация:The BABAR Collaboration has an intensive program studying hadronic cross sections in low-energy $e^+e^-$ annihilations, which are accessible with data taken near the $\Upsilon(4S)$ via initial-state radiation. Our measurements allow significant improvements in the precision of the predicted value of the muon anomalous magnetic moment. These improvements are necessary for shedding light on the current $\sim 3\sigma$ difference between the predicted and the experimental values. We have previously published results on a number of processes with two to six hadrons in the final state. We report here on several recent measurements of exclusive $e^+e^-\to$ hadrons cross sections.
