The estimation of the Z' gauge boson mass in E6 models

The aim of this study is to estimate the Z' boson mass by using the calculations of the decay width of Z (theta;) boson. So, the decay width of the extra Z boson is calculated numerically in effective rank 5 models for different mixing angles theta; of the model and for different mass values of the extra Z boson. The decay width of Z' boson to the Standard Model (SM) fermions is found to be between 4.42 and 19.36 GeV and the full decay width of Z' boson to all particles is found to be between 20.88 and 37.15 GeV. We calculated the full decay width at the angle theta; ? 0 for Z' and Z2 › Z'. The full decay width of Z' boson is written in a single equation according to our calculations. By using these calculations and the previous works the mass of Z' boson and the number of generations of the exotic particles are estimated. © Pleiades Publishing, Ltd. 2009