Luminosity measurement with CMD-3 detector at the VEPP-2000 e+e- collider
Preliminary results of the luminosity measurement in a broad energy range are presented. The analysis is based on the integrated luminosity ~60 pb⁻¹. For the energy range smaller 320 MeV the luminosity was determined using two processes: e⁺e⁻ → e⁺e⁻, μ⁺μ⁻. As for higher energies up to 2 GeV the luminosity determination was based on study processes e⁺e⁻ → e⁺e⁻, γγ. The applying two well known QED processes provided cross-check possibility, that in turn, allowed more correctly estimate the systematics errors. Currently the systematics for luminosity is estimated as 0.5% ÷ 1% for different energy region.