Study On W’ And Neutrino Mass Generation Mechanism At The High Energy Collider

In particle physics,the Standard Model(SM)which has been precisely tested by experiments in the past few decades has gained a great achievement particularly with Higgs boson discovered at the Large Hadron Collider in Europe in 2012.However,there are still some questions not solved due to the incompleteness of it with the progress of experiments and the development of theory.These indicate that the SM needs to be further extended.Recently,search for beyond SM physics has become one of the main research goals of particle physics.In this paper,we will focus on searching for new physical signal W’ at the high-energy collider and test neutrino mass generation mechansim or related physical problems.The main work is as follows:1.The new physical model can briefly introduced by adding one SU(2)group to the SM gauge group which leads to the appearance of the beyond SM particvle W’ in the new phys-ical models.We focus on the W’ production with the top-quark process in this paper and predicting the possibility of finding new physical signals on the detector.In case of resonance peak of W’ not being observed,we concentrate on the new physics signal search with the deviation from the SM prediction.The events of signals with two jets and one charged lepton and missing energy are simulated together with the dominant SM backgrounds.In this paper,it is found that suitable cuts on the kinematic observ-ables can effectively suppress the standard model backgrounds,so that it is possible to search for W’ signal at the LHC with its mass less than 6.6 TeV.All of the research has an important significance.2.Neutrino oscillation observed by astronomy experiments provide solid evidences for both the massive neutrinos and other new physics.In order to obtain tiny massive neutrinos,we use the Inverse Seesaw mechanism as a framework which has a natural Yukawa coupling scale of O(1)and keep the new physical energy scale achievable by the high energy collider.In this paper,a pair of W bosons produced at electron-positron collider is considered.One of the W boson decays into two jets and the other into leptons.Considering initial beams(electron and positron beams)polar-izations and W polarizations(vertical and horizontal polarizations),we can test Inverse Seesaw framework.Furthermore,this research has an important value for test of the Inverse Seesaw mechanism in future lepton colliders.