Cosmological Constant in SUGRA Models Inspired by Degenerate Vacua

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It is well known that global symmetries protect local supersymmetry and a zero value for the cosmological constant in no--scale supergravity. A particular breakdown of these symmetries, which ensures the vanishing of the vacuum energy density, leads to the natural realisation of the multiple point principle (MPP). In the MPP inspired SUGRA models the cosmological constant is naturally tiny.
Parallel talk at ICHEP08, Philadelphia, USA, July 2008. 4 pages, 1 figure

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High Energy Physics - Theory

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http://salesiana.dossiersoluciones.com/handle/123456789/171548

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0810.0524
 http://arxiv.org/abs/0810.0524

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arXiv