Prospects of improving accuracy of the hadronic cross section measurements to the 10−3 level at the VEPP-2000 e+e− collider: experimental and theoretical problems

The main sources of systematic errors of the hadronic cross section measurements at the CMD-2 and SND detectors at VEPP-2M are discussed. To push down a total systematic error to the per mille accuracy in forthcoming experiments at VEPP-2000 some theoretical calculations and detector parameters should be significantly improved. These are: trigger and detection efficiencies, determination of the fiducial volume and event selection procedure, radiative corrections and pion losses caused by nuclear interaction with detector material. New results expected in the nearest future are also mentioned.