CP violation beyond the standard model

The fundamental sources of CP violation in theories of physics beyond the standard model is an important issue which has not been sufficiently studied. In this paper, we begin by discussing the possible origins of CP violation in string theory and the potential influence of its phenomenology on string theory. This naturally develops, into a consideration of supersymmetry breaking, specifically the soft-breaking supersymmetric Lagrangian, L-soft. There exist two extreme scenarios which may realistically accommodate CP violation; the first involves small soft phases and a large CKM phase, delta(CKM), whereas the second contains large soft phases and small delta(CKM) We argue that there is reasonable motivation for delta(CKM) to be almost zero and that the latter scenario should be taken seriously. Consequently, it is appropriate to consider what CP violating mechanisms could allow for large soft phases, and hence measurements of these soft phases (which can be deduced from collider results, mixings and decays, experiments exploring the Higgs sector or from electric dipole moment values) provide some interesting phenomenological implications for physics beyond the standard model.