Bounding the Number of Light Neutrinos Species in a Left-Right Symmetric Model

A. Gutierrez-Rodriguez, M. A. Hernandez-Ruiz, M. A. Perez +1

Using the experimental values for the rates $R_{exp}^{LEP}={\Gamma }_{inv}/{\Gamma }_{l\bar{l}}=5.942\pm 0.016$, $R^{Giga-Z_1}={\Gamma }_{inv}/{\Gamma }_{l\bar{l}}=5.942\pm 0.012$ (most conservative) and $R^{Giga-…