# Instrumentation for Colliding Beam Physics

from 24 February 2014 to 1 March 2014
Asia/Novosibirsk timezone
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# Contribution Poster

Colliders and Detector Integration

# Luminosity measurement with CMD-3 detector at the VEPP-2000 e+e- collider

## Abstract content

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.