Pair production of Higgs bosons associated with Z boson in the left–right twin Higgs model at the ILC Original Research Article

The left–right twin Higgs (LRTH) model predicts the existence of three additional Higgs bosons: one neutral Higgs image and a pair of charged Higgs bosons image. In this paper, we studied the production of a pair of charged and neutral Higgs bosons associated with standard model gauge boson Z at the ILC, i.e., image and image. We calculate the production rate and present the distributions of the various observables, such as, the distributions of the energy and the transverse momenta of final Z-boson and charged Higgs boson image, the differential cross section of the invariant mass of charged Higgs bosons pair, the distribution of the angle between charged Higgs bosons pair and the production angle distributions of Z-boson and charged Higgs boson image. Our numerical results show that, for the process image, the production rates are at the level of image with reasonable parameter values. For the process of image, we find that the production cross section are smaller than image in most of parameter space. However, the resonance production cross section can be significantly enhanced.