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Full-Text Articles in Physics
Constraints On The Minimal Supergravity Model From Non-Standard Vacua, Howard Baer, Michal Brhlik, Diego Castano
Constraints On The Minimal Supergravity Model From Non-Standard Vacua, Howard Baer, Michal Brhlik, Diego Castano
Chemistry and Physics Faculty Articles
We evaluate regions of parameter space in the minimal supergravity model where "unbounded from below" (UFB) or charge or color-breaking minima (CCB) occur. Our analysis includes the most important terms from the one-loop effective potential. We note a peculiar discontinuity of results depending on how renormalization group improvement is performed: One case leads to a UFB potential throughout the model parameter space, while the other typically agrees quite well with similar calculations performed using only the tree level potential. We compare our results with constraints from cosmology and naturalness and find a preferred region of parameter space which implies m …
Consequences Of Supergravity With Gauged U(1)R Symmetry, Diego Castano, D. Z. Freedman, C. Manuel
Consequences Of Supergravity With Gauged U(1)R Symmetry, Diego Castano, D. Z. Freedman, C. Manuel
Chemistry and Physics Faculty Articles
The structure of gauged R-supergravity Lagrangians is reviewed, and we consider models with a hidden sector plus light fields of the MSSM. A simple potential for the hidden sector is presented which has a global minimum with zero cosmological constant and spontaneously broken SUSY and R-symmetry. The U(1)R vector multiplet acquires a Planck scale through the Higgs mechanism, and it decouples at low energy. Due to very interesting cancellations, the U(1)RD-terms also drop out at low energy. Thus no direct effects of the gauging of R-symmetry remain in the low-energy effective Lagrangian, …