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

Achasov, M. N.; Aulchenko, V. M.; Beloborodov, K. I.; Berdyugin, A. V.; Bozhenok, A. V.; Bukin, D. A.; Burdin, S. V.; Dimova, T. V.; Dolinsky, S. I.; Drozdetsky, A. A.; Druzhinin, V. P.; Dubrovin, M. S.; Gaponenko, I. A.; Golubev, V. B.; Ivanchenko, V. N.; Ivanov, P. M.; Korol, A. A.; Koshuba, S. V.; Kukartsev, G. A.; Nesterenko, I. N.; Otboev, A. V.; Pakhtusova, E. V.; Popov, V. M.; Salnikov, A. A.; Serednyakov, S. I.; Shary, V. V.; Shatunov, Yu. M.; Sidorov, V. A.; Silagadze, Z. K.; Usov, Yu. V.; Vasiljev, A. V.; Zakharov, A. S.

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

Authors

Description

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