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arXiv · hep-ex/9910070

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

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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. 2000-01-12. New experimental data for the decays $ϕ\toμ^+μ^-$ and $ϕ\toπ^+π^-$ from SND detector. https://doi.org/10.1016/s0375-9474(00)00274-8

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