New experimental data for the decays $ϕ\toμ^+μ^-$ and $ϕ\toπ^+π^-$ from SND detector

Abstract

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.

5 pages, 4 figures, talk given at 8th International Conference on Hadron Spectroscopy (HADRON 99), Beijing, China, 24-28 Aug 1999