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A precision measurement of the number of neutrino species
1990
Physics Letters B
A precision measurement of the number of neutrino species Adeva, B.; Adriani, O.; Aguilar-Benitez, M.; Akbari, H.; Alcaraz, J.; Aloisio, A.; Alverson, G.; Alviggi, M.G.; Linde, F.L. We have measured the cross section for e +e-~hadrons over the center of mass energy range of the Z ° peak, from 88.22 to 95.03 GeV. We determine the Z ° mass Mz = 91.164 + 0.013 (experiment) + 0.030 (LEP) GeV. Within the framework of the standard model we determine the invisible width,/zm,~slb~ ~ = 0.502 + 0.018
doi:10.1016/0370-2693(90)91267-f
fatcat:di5r3u7nrjcg7kpuummpqrc5im