Measurement of hadronic cross-sections at VEPP-2000

Overview of the BINP accelerator complex

“…The experimental program covers R measurements, studies of hadronic final states, mesons and theirs excitations, and nucleon electromagnetic formfactor at threshold, etc. [11,12]. The main design collider parameters are listed in Table 3.…”

Separation ofe+e−→e+e−ande+e−→ π+π−events based on the difference in the energy deposition profiles in SND detector calorimeter.

“…These measurements are largely motivated by the need of high-precision calculation of the hadronic contribution to the anomalous magnetic moment of the muon (g − 2)/2 [3]. In particular, the e + e − → π + π − cross section at the energy region below 1 GeV gives the dominant contribution to this value and should be measured with accuracy higher than 1% [4].…”