Aspects Of Physics Beyond Standard Model:Higgs Physics, Supersymmetry And Dark Matter

In July,2012,the two experiment groups(ATLAS,CMS)in the Large Hadron Collider(LHC)announced that they have found a new particle,the Higgs,which is the last piece of the Standard Model(SM)in particle physics.The Standard Model is really successful when we use it to explain most of the phenomena of the nature,however,it is still incomplete.For the new-discovered Higgs particle,as it is a scalar particle,it will suffer quadratic divergence in its self-energy,which will induce the naturalness problem.And as we known,the particles in Standard Model only make up 4% of the total energy of our universe,and the rest part comes from so called Dark Matter(DM)and Dark Energy which are not included in the Standard Model.Further,most of the visible matter are made up mainly by normal particles,the asymmetry between the original particles and anti-particles requires enough CP violation effect which,however,still can not be provided by Standard Model.Addressing these questions,theorists construct various new physics models containing new features that should be verified in experiments.In this thesis,I will focus on the following three parts: Higgs physics,supersymmetry and dark matter,and investigate in detail the determination of the CP property of the interaction between Higgs and ? lepton at LHC,the phenomenology of superpartner of b-quark(sbottom)in Minimal Supersymmetric extended Standard Model(MSSM)at LHC and also the phenomenology of the dark matter candidate in MSSM in direct,indirect and collider detection.After the upgrade,the LHC now is operating at higher energy and luminosity,various dark matter experiments are also collecting data.At the same time,in China,theorists are discussing the project of China Electron Positron Collider(CEPC).It is crucial for us to get prepared for the possible results from all these experiments.