Mirror Twin Higgs Model And The Flavor Changing Processes

The unified theory of electricweak and quantum chromodynamics in particle physics is called the standard model theory.The standard model in particle physics can well describe the strong interaction,electromagnetic interaction and weak interaction through SU(3)C × SU(2)L×U(1)Y.But the standard model is not perfect.It has a series of problems,such as the problems of naturalness,dark matter and dark energy,gravitation and neutrino mass and so on.In order to deal with the problem of naturalness,various new physical models have been put forward.For example,Supersymmetry theory,Technicolor Model,Extra Dimension Model and Left Right Twin Higgs Model and so on.Among these new physical models,Twin Higgs Model can solve the hierarchy problem.Twin Higgs Model can not only solve the hierarchy problem,but also explain the phenomenon that it is difficult to find the top quark partners on the collider.Based on Z2 symmetry,the model replicates the standard model particles and introduces the approximate global symmetry of scalar potential.In the twin higgs model,the global symmetry will be broken,and the scalar particle higgs exists in the form of pseudo Goldstone particle.Mirror Twin Higgs Model which belongs to the Twin Higgs Model,can realize the separation symmetry through mirror symmetry,and the second divergence term of Higgs particle mass term can be eliminated under this symmetry.The main work of this paper is to calculate the single loop process of b→sγand verify its ward identical equation.Ward identical equation is an important relation in quantum field theory.This process is applicable to the Standard Model and the Mirror Twin Higgs Model with the same charge gauge boson coupling structure.In this paper,we combine with Feynman’s specification and use the method of dimension normalization to expand the function of loop graph to verify the ward identity of single loop leading order in b→sγ neutral current process with taste change.The results show that in the single loop part of b→sγ,not only the sum of divergent terms will automatically disappear,but also the ward identity is established.In addition,the methods and techniques used in the verification process are also applicable to other similar processes.