Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-01-13
Physics
High Energy Physics
High Energy Physics - Phenomenology
18 pages, talk presented at SSS-99, Seoul, Korea, June, 1999
Scientific paper
Supersymmetric CP violating phases are examined within the framework of gravity mediated supergravity grand unified models with R parity invariance for models with a light ($\stackrel{<}{\sim} 1$ TeV) particle spectrum. In the minimal model, the nearness of the t quark Landau pole naturally suppresses the t-quark cubic soft breaking parameter at the electroweak scale allowing the electron and neutron experimental electric dipole moment (EDM) constraints to be satisfied with a large GUT scale phase. However, the EDM constraints require that $\theta_B$, the quadratic soft breaking parameter phase be small at the electroweak scale unless tan$\beta\stackrel{<}{\sim}3$, which then implies that at the GUT scale this phase must be large and highly fine tuned to satisfy radiative breaking of $SU(2)\times U(1)$. Similar results hold for non minimal models, and a possible GUT model is discussed where all GUT scale CP violating phases are naturally small (i.e. O($10^{-2})$). An interesting D-brane model is examined which enhances the size of the phases over much of the parameter space at the electroweak sector for tan$\beta\stackrel{<}{\sim} 5$, but still possesses the fine tuning problem at the GUT scale.
Accomando Elena
Arnowitt Richard
Dutta Bhaskar
No associations
LandOfFree
CP Violaing Phases In SUSY GUT Models does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with CP Violaing Phases In SUSY GUT Models, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and CP Violaing Phases In SUSY GUT Models will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-360748