Monte Carlo generator with radiative corrections for the processes e+e-→e+e-, μ+μ- and π +π- at low energies

The Cryogenic Magnetic Detector (CMD-2) at the VEPP-2M collider has collected a total integrated luminosity of about 30 pb(-1). The cross sections of e(+)e(-) annihilation into hadrons were measured in the energy range from 0.37 to 1.39 GeV. A Monte Carlo generator has been constructed which incorporates the vacuum polarization effects with radiative corrections. The generator simulates production of Bhabha events, two charged pions and muons as well as photon jets. Radiative corrections in the first order of a are taken into account exactly. By means of the structure-function method the leading logarithmic contributions are calculated in all orders of alpha. The theoretical accuracy of the cross section calculation is estimated to be better than 0.2%.