Single Double Charged Scalar Particle Generation And The Top Quark Partner T Joint Generation

Although the standard model has passed a lot of precision experimental tests, it still suffers some theoretical problems,such as too many free paramenters, triviality, and unnaturalness, etc. Furthermore, the neutrino oscilla-tion experiments have made one believe that neutrinos are massive, oscillate in flavor. Therefore, standard model can only be an effective theory below some high energy scale. There may be new physics beyond the standard model. So, many new physics have been proposed for example:the left-right twin Higgs model, triplet model and so on. The Higgs triplet model provides an economical approach which implemets the ideas of the seesaw type.The Higgs triplet model predicts the existence of seven physical Higgs bosons which are two CP-even neutral bosons H1 and H2, a CP-odd neutral one A, a pair of single charged bosons H±, and a pair of doubly charged Higgs bosons H±±. These new particles can produce rich phenomenology at present and in future high energy collider experiments. Since charge conservation prevents doubly charged scalars from decaying to a pair of quarks and their YuKawa coupling hij violates lepton number conservation, H±±would give rise to a distinctive experimental signal, which has lower background.The tripletHiggs boson of hypercharge Y=2 whose vacuum expectation value (VEV)vΔprovides Majorana neutrino masses without introducing right-handed neutrinos.First,we calculate the contributions of H±±to the er process. We can obtain the constraints on the combina-tion of the free parameters hij, mH. Taking into account these constrains, we consider single production of H±±via eÎ¥collision at the next generation e+e-international linear collider (ILC) and the LHeC. Our numerical results show that the production cross sections at these two kinds of high energy colliders are very sensitive to the YuKawa couplings hij.We further calculate the contributions of the processes eÎ¥â†'e+H--,eÎ¥â†'μ+H-and eÎ¥â†'T+H--. We find that in the wide range of the parameter space of the HTM, their values can be large enough to be detected in the future ILC.In the context of the littlest Higgs(LH) model and the left-right twin Higgs (LRTH) model, we study production of charged Higgs boson associated with top partner at the LHC. We find that, in the LH model, its cross section can be significant large for the scale parameter f= 500GeV, while sharply decreases as f increasing. In the LRTH model, this production process mainly transfers to the tibbb final state at the LHC and its production rate can reach 167.2fb.