Neural network predictions for Z' boson within LEP2 data set of Bhabha process

Abstract

The neural network approach is applied to search for the Z'-boson within the LEP2 data set for e+ e- -> e+ e- scattering process. In the course of the analysis, the data set is reduced by 20 percent. The axial-vector and vector couplings of the Z' are estimated at 95 percent CL within a two-parameter fit. The mass is determined to be 0.53-1.05 TeV. Comparisons with other results are given.

Comments: 12 pages, 6 figures; results of all the LEP2 collaborations were analysed