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Abstract
The aim of this thesis is to analyze the CP asymmetry of the B− !DK−decay within the standard model SM and the minimal supersymmetric standard model MSSM, and to compare our results with
the experimental values of babar collaborations.
This thesis consists of four chapters:
Chapter 1 gives a review on the gauge principle for gauge theories which are U(1)gauge theory as an example for abelian-gauge theory (QED),as well as SU(2) and SU(3) as examples of non-abelian gauge theories, it also spots light on the phenomenology of the weak interaction that studied through some theories such as : Fermi-theory,V-A
theory of Feynman and Gell-man and IV B theory of Lee,Yang and Glashow.
Chapter 2 we present an introduction of the construction of the electroweak interaction theory, and we give a review on symmetry modes and symmetry breaking mechanism that includes that Goldstone and Higgs mechanism, we discuss the symmetry breaking sector of theelectroweak theory, this chapter shows the role of the Higgs Mechanism
in generating masses for gauge bosons and fermions, the Lagrangiang formalism of the standard model is also discussed in this chapter.
Chapter 3 introduces the supersymmetric theory which involves:
susy algebra, superspace and superfield as well as vector and chiral superfields.
It also gives an introduction to the minimal supersymmetric standard model MSSM and SUSY breaking terms that includes breaking SUSY spontaneously and soft SUSY-breaking terms,also this chapter represents the superpotential and electroweak symmetry breaking in
MSSM, the supersymmetric particles of the MSSM and their spectrum.