New experimental data for the decays ϕμ+μ- and ϕπ+π- from SND detector
M. N. Achasov, V. M. Aulchenko, K. I. Beloborodov, A. V. Berdyugin, A. V. Bozhenok, D. A. Bukin, S. V. Burdin, T. V. Dimova, S. I. Dolinsky, A. A. Drozdetsky, V. P. Druzhinin, M. S. Dubrovin, I. A. Gaponenko, V. B. Golubev, V. N. Ivanchenko, P. M. Ivanov, A. A. Korol, S. V. Koshuba, G. A. Kukartsev, I. N. Nesterenko, A. V. Otboev, E. V. Pakhtusova, V. M. Popov, A. A. Salnikov, S. I. Serednyakov, V. V. Shary, Yu. M. Shatunov, V. A. Sidorov, Z. K. Silagadze, Yu. V. Usov, A. V. Vasiljev, A. S. Zakharov
Abstract
The processes e+e-μ+μ- and e+e-π+π- have been studied with SND detector at VEPP-2M e+e- collider in the vicinity of ϕ(1020) resonance. The branching ratios B(ϕμ+μ-)=(3.30 0.45 0.32)× 10-4 and B(ϕπ+π-)=(0.71 0.11 0.09)× 10-4 were obtained.
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