arXiv subjects
Publications and source records attributed to V. M. Popov.
The program of upgrade of the Spherical Neutral Detector for future experiments at a new VEPP-2000 $e^+e^-$ collider is presented. Modernization includes upgrades of electromagnetic calorimeter, tracking system, detector electronics, data acquisition system, and offline software. It is also planned to equip the detector with two new subsystems: particle identification system based on aerogel Cherenkov counters and external electron tagging system for $γγ$ physics.
The cross section of the $e^+e^-\toωπ^0\toπ^0π^0γ$ reaction was measured by the SND detector at VEPP-2M $e^+e^-$ collider in the energy range from threshold up to 1.4 GeV. Results of the cross section fitting by the sum of $ρ$, $ρ^{\prime}$ and $ρ^{\prime\prime}$ contributions are presented.
The new data on $ρ,ω,ϕ$ radiative decays into $π^0γ,ηγ,η'γ$ from SND experiment at VEPP-2M $e^+e^-$ collider are presented.
The processes $e^+e^-\toμ^+μ^-$ and $e^+e^-\toπ^+π^-$ have been studied with SND detector at VEPP-2M $e^+e^-$ collider in the vicinity of $ϕ(1020)$ resonance. The branching ratios $B(ϕ\toμ^+μ^-)=(3.30\pm 0.45\pm 0.32)\times 10^{-4}$ and $B(ϕ\toπ^+π^-)=(0.71\pm 0.11\pm 0.09)\times 10^{-4}$ were obtained.
The current status of experiments with SND detector at VEPP-2M e^+e^- collider in the energy range 2E_0=400-1400 MeV and recent results of data analysis for $ϕ$, $ω$ and $ρ$ decays and e^+e^- annihilation into hadrons are presented.
The Spherical Neutral Detector (SND) operates at VEPP-2M collider in Novosibirsk studying e^+e^- annihilation in the energy range up to 1.4 GeV. Detector consists of a fine granulated spherical scintillation calorimeter with 1632 NaI(Tl) crystals, two cylindrical drift chambers with 10 layers of sense wires, and a muon system made of streamer tubes and plastic scintillation counters. The detector design, performance, data acquisition and processing are described.