CpViolating Form Factors of the WBoson in the TwoHiggs and Supersymmetric Models.
Abstract
A detailed analysis of the CPviolating form factors of the Wboson is performed in two theories, the twoHiggs doublet model and the minimal supersymmetric extension of the Standard Model. In chapter 2 we study the electric dipole moment (EDM) of the Wboson in the twoHiggsdoublet model. There are no contributions at the oneloop level and therefore the calculations are performed at twoloops, with all relevant Feynman diagrams included. It is shown that the WEDM could be as large as 10^{21} 10^{20} e cm, for reasonable values of the parameters involved. The computations were facilitated by the use of symbolic manipulation programs written in Mathematica with the express purpose of handling Dirac gamma matrices and their traces and finding algebraically the Feynman parametrization of momentum integrals. These programs are listed in Appendix B. The results correct and extend previous studies that have appeared in the literature (He and McKellar 1990; Chang, Keung and Liu 1991; Vendramin 1993). In chapter 3 we study other CPviolating form factors of the Wboson, but now this is done for general values of the momentum transfer squared q^2 for WWgamma and WWZ vertices. All pertinent oneloop diagrams are examined in the context of the twoHiggsdoublet model and the minimal supersymmetric extension of the Standard Model. Where this work overlaps with previous studies, we find partial agreement (He, Ma and McKellar 1993; Vendramin 1992). In general, the values found are too small to be measurable at accelerators with the exception of the Podd, Todd WWgamma form factor in supersymmetry which, for some values of q^2, may reach the 10 ^{2} level. This may be detectable in the near future at some proposed colliders, or provide constraints on the parameters of the theory.
 Publication:

Ph.D. Thesis
 Pub Date:
 January 1995
 Bibcode:
 1995PhDT........79L
 Keywords:

 Physics: Elementary Particles and High Energy