Investigation of anomalous couplings of Higgs boson

In this thesis, hZZ ve hGZ anomalous couplings have been investigated through the process Ge- > hZe- using model independent effective theories. Here, the process Ge- > hZe- is considered as the subprocess in the electron-positron collision. In this process, Higgs boson (h) decays into the bb ̅ pair, while Z boson decays into the a pair of charged leptons (e, Mü). In the Ge collision, the cross-section values have been calculated for both the new physics effects and the Standard Model background. The Wilson coefficients of dimension-six operators have been taken into consideration while obtaining these values. The Weizsacker-Williams Approach (WWA) and Compton back scattering photons (Laser) mechanism for the photon in the Ge collision are discussed separately and the results are compared. The bounds obtained with regard to the laser photon are much more sensitive than that of WWA. For both single parameter and two parameter analysis, X^2 analysis has been used. Thus, considering the center-of-mass energy of electron-positron system of 1, 1.5, 3 TeV and the integrated luminosity of 100, 500, 1000, 1500, 2000 fb^-1, the upper and lower bounds on single parameter of the Wilson coefficients have been obtained at 95% confidence level (CL) for the process Ge- > hZe-. In addition, two dimensional contour plots have been obtained for above center-of-mass energy with integrated luminosity of 1000, 1500, 3000 fb^-1, respectively. The results show that limits on Wilson coefficients can further improve the current limits