Measurement of the decay phi->mu+mu-

Details Measurement of the decay phi->mu+mu- Measurement of the decay phi->mu+mu-

1999-05-19

arxiv.org/abs/hep-ex/9905030v1

Phys.Lett.B456:304-309,1999

Physics

High Energy Physics

High Energy Physics - Experiment

6 pages, 5 figures, to be published in Physics Letters B

Scientific paper

10.1016/S0370-2693(99)00502-X

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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