Gauged N = 4 supergravities in five dimensions and their magnetovac backgrounds |
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| Affiliation: | 1. Centro de Estudios Públicos, Chile;2. Murdoch University, Australia;3. ISCTE - University Institute of Lisbon, Portugal;4. University of Bologna, Italy;5. University of Queensland, Australia;6. University of Newcastle, Australia;1. Department of Social and Behavioral Studies, University West, Sweden;2. Department of Psychology, University of Gothenburg, Sweden;3. Department of Cognitive Neuroscience, University of Skövde, Sweden;4. Department of Psychology, Pennsylvania State University, USA |
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| Abstract: | Gauged N = 4 supergravity theories with Yang-Mills symmetry SU(2) × U(1) are constructed in five dimensions. As in four dimensions, the presence of a nonsimple gauge group leads to the existence of three distinct theories, depending (in five dimensions) on the values of the SU(2) and U(1) coupling constants. Two of the theories are distinguished by the relative sign of the coupling constants; one of these has a vacuum state exhibiting the full N = 4 anti-de Sitter supersymmetry SU(2,2|2), while the other has a scalar potential with no critical points. The third theory, in which the SU(2) coupling constant is taken to be zero, has vanishing scalar potential. This leads to vacua with spontaneously broken supersymmetry and zero cosmological constant, admitting compactification to four dimensions. All three theories possess “magnetovac” ground states with residual supersymmetry and hence presumably stable. Several of these may be interpreted as four-dimensional cosmological models. |
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