New models of gauge- and gravity-mediated supersymmetry breaking
- Enrico Fermi Institute, University of Chicago, 5640 South Ellis Avenue, Chicago, Illinois 60637 (United States)
- Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, Illinois 60510 (United States)
We show that supersymmetry breaking in a class of theories with SU(N){times}SU(N{minus}2) gauge symmetry can be studied in a calculable {sigma} model. We use the {sigma} model to show that the supersymmetry-breaking vacuum in these theories leaves a large subgroup of flavor symmetries intact, and to calculate the masses of the low-lying states. By embedding the standard model gauge groups in the unbroken flavor symmetry group we construct a class of models in which supersymmetry breaking is communicated by both gravitational and gauge interactions. One distinguishing feature of these models is that the messenger fields, responsible for the gauge-mediated communication of supersymmetry breaking, are an integral part of the supersymmetry-breaking sector. We also show how, by lowering the scale that suppresses the nonrenormalizable operators, a class of purely gauge-mediated models with a combined supersymmetry-breaking-cum-messenger sector can be built. We briefly discuss the phenomenological features of the models we construct. {copyright} {ital 1997} {ital The American Physical Society}
- Research Organization:
- Fermi National Accelerator Laboratory
- DOE Contract Number:
- AC02-76CH03000; FG02-90ER40560
- OSTI ID:
- 562441
- Journal Information:
- Physical Review, D, Vol. 55, Issue 9; Other Information: PBD: May 1997
- Country of Publication:
- United States
- Language:
- English
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