Initial-State Radiation Measurement of the e+e- -> pi+pi-pi+pi- Cross Section
J. P. Lees, V. Poireau, V. Tisserand, J. Garra Tico et autres
We study the process e+e- -> pi+pi-pi+pi-gamma, with a photon emitted from the initial-state electron or positron, using 454.3 fb^-1 of data collected with the BABAR detector at SLAC, corresponding to approximately 260,000 signal events. We use these data to extract the …