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.
@article{arxiv.hep-ex/9905030,
title = {Measurement of the decay phi->mu+mu-},
author = {M. N. Achasov and S. E. Baru and A. V. Bozhenok and D. A. Bukin and S. V. Burdin and T. V. Dimova and V. P. Druzhinin and M. S. Dubrovin and I. A. Gaponenko and V. B. Golubev and V. N. Ivanchenko and P. I. Ivanov and A. A. Korol and S. V. Koshuba and E. A. Perevedentsev and E. E. Pyata and A. A. Salnikov and S. I. Serednyakov and V. V. Shary and Yu. M. Shatunov and V. A. Sidorov and Z. K. Silagadze and Yu. V. Usov},
journal= {arXiv preprint arXiv:hep-ex/9905030},
year = {2019}
}
Comments
6 pages, 5 figures, to be published in Physics Letters B