Measurement of the E+ E- to Pi+ Pi- Pi+ Pi-, K+ K- Pi+ Pi-, K+ K- K+ K- Cross Sections Using initial State Radiation at BaBar

First results of a study of the e+e- → π+π-π+π-γ process with hard photon emitted from initial state are presented. About 60000 fully reconstructed events have been selected based on 89.3 fb-1 of BABAR data. The invariant mass of the hadronic final state defines the effective collision c.m. energy, and so BABAR ISR data can be compared to the relevant direct e+e- measurements. From obtained 4π mass spectrum we evaluate e+e- → π+π-π+π- cross section for the range of c.m.s. energy from 0.6 to 4.5 GeV. The systematic error of the cross section measurement is 5% and comparable with the best e+e- data. The cross sections for identified 2K2π and 4K final states also have been presented