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ISSN - 01709739, Zeitschrift f�r Physik C-Particles and Fields, 1996, vol. 70, p. 31-37

The measurement of R in e+e--annihilation at center-of-mass energies between 7.25 and 10.34 GeV

Blinov A. E., Blinov V. E., Bondar A. E., Bukin A. D., Groshev V. R., Klimenko S. G., Onuchin A. P., Panin V. S., Protopopov I. Ya, Shamov A. G., Sidorov V. A., Skovpen Yu I., Skrinsky A. N., Tayursky V. A., Telnov V. I., Tikhonov Yu A., Tumaikin G. M., Undrus A. E., Vorobiov A. I., Zhilich V. N.

The total cross section of the process e+e- → hadrons has been measured in the center-of-mass energy range between 7.25 and 10.34 GeV using the MD-1 detector at the VEPP-4 collider. The ratio R = σ(e+e- → hadrons)/ σ(e+e- → μ+μ-) was found to be constant in this energy range with the average value of 3.58 ± 0.02 ± 0.14. © Springer-Verlag 1996.