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arXiv · hep-ex/9905030

Measurement of the decay phi->mu+mu-

M. N. Achasov·S. E. Baru·A. V. Bozhenok·D. A. Bukin·S. V. Burdin·T. V. Dimova·V. P. Druzhinin·M. S. Dubrovin·I. A. Gaponenko·V. B. Golubev·V. N. Ivanchenko·P. I. Ivanov·A. A. Korol·S. V. Koshuba·E. A. Perevedentsev·E. E. Pyata·A. A. Salnikov·S. I. Serednyakov·V. V. Shary·Yu. M. Shatunov·V. A. Sidorov·Z. K. Silagadze·Yu. V. Usov
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Abstract

The process e^+e^- ->mu^+mu^- has been studied with SND detector at VEPP-2M e^+e^- collider in the vicinity of phi(1020) resonance. The product of branching ratios of phi meson into leptons \sqrt{B(phi->mu^+mu^-) B(phi-> e^+e^-)}=(3.14+-0.22+-0.14)x10^{-4} was measured from the interference in the cross section of the process e^+e^- ->mu^+mu^-. The branching ratio B(phi->mu^+mu^-)=(3.30+-0.45+-0.32)x10^{-4} was obtained.

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M. N. Achasov, S. E. Baru, A. V. Bozhenok, D. A. Bukin, S. V. Burdin, T. V. Dimova, V. P. Druzhinin, M. S. Dubrovin, I. A. Gaponenko, V. B. Golubev, V. N. Ivanchenko, P. I. Ivanov, A. A. Korol, S. V. Koshuba, E. A. Perevedentsev, E. E. Pyata, A. A. Salnikov, S. I. Serednyakov, V. V. Shary, Yu. M. Shatunov, V. A. Sidorov, Z. K. Silagadze, Yu. V. Usov. 1999-05-19. Measurement of the decay phi->mu+mu-. https://doi.org/10.1016/s0370-2693(99)00502-x

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