A custodial symmetry for the cosmological constant in the effective theories of four-dimensional superstrings |
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Institution: | 1. Department of Pharmacology, University of Colorado School of Medicine, Aurora, CO 80045, USA;2. Center for Epigenetics, Van Andel Research Institute, Grand Rapids, MI 49503, USA |
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Abstract: | We discuss supersymmetry breaking in the effective supergravity theories of four-dimensional N = 1 superstrings. Improving a recent suggestion, we introduce a superpotential modification that describes spontaneous supersymmetry breaking with vanishing cosmological constant and Str M2 = 0 at any minimum of the tree level potential. We prove that in a class of models there are classical minima at which also Str f(M2 = 0 for any function f. In particular, the whole one-loop cosmological constant vanishes. We propose a new boson-fermion symmetry of the spectrum, relating the graviton and the “dilatino”, which explains these remarkable properties. |
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