Abstract
We show that EDMs obey a simple approximate scaling under the transformation m₀→λm₀,m1/2→λm1/2 in the large μ region when μ itself obeys the same scaling, i.e., μ⃗λμ. In the scaling region knowledge of a single point in the MSSM parameter space where the cancellation in the EDMs occurs allows one to generate a trajectory in the m₀-m1/2 plane where the cancellation mechanism holds and the EDMs are small. We illustrate these results for the MSSM with radiative electroweak symmetry breaking constraints. We also discuss a class of D-brane models based on type IIB superstring compactifications which have non-universal phases in the gaugino mass sector and allow large CP violating phases consistent with the EDM constraints through the cancellation mechanism. The scaling in these D-brane models and in a heterotic string model is also discussed.
Keywords
EDM, D-brane models, CP violating phases, SUSY, cancellation mechanism
Subject Categories
String models, Branes
Disciplines
Physics
Publisher
American Physical Society
Publication Date
4-4-2000
Rights Information
Copyright (2000) American Physical Society
Rights Holder
American Physical Society
Recommended Citation
Ibrahim, Tarek and Nath, Pran, "Large CP phases and the cancellation mechanism in EDMs in SUSY, string, and brane models" (2000). Physics Faculty Publications. Paper 457.
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Notes
Originally published in Physical Review D v.61 (2000): 093004. DOI: 10.1103/PhysRevD.61.093004