Ae. Blinov et al., THE MEASUREMENT OF R IN E(-)-ANNIHILATION AT CENTER-OF-MASS ENERGIES BETWEEN 7.25 AND 10.34 GEV()E(), Zeitschrift fur Physik. C, Particles and fields, 70(1), 1996, pp. 31-37
The total cross section of the process e(+)e(-) --> hadrons has been m
easured 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 = sigma(e(
+)e(-) --> hadrons)/sigma(e(+)e(-) --> mu(+) mu(-)) was found to be co
nstant in this energy range with the average value of 3.58 +/- 0.02 +/
- 0.14.