On the Smallness of the Cosmological Constant in SUGRA Models Inspired by Degenerate Vacua

Details On the Smallness of the Cosmological Constant in SUGRA Models Inspired by Degenerate Vacua On the Smallness of the Cosmological Constant in SUGRA Models Inspired by Degenerate Vacua

2009-09-25

arxiv.org/abs/0909.4703v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

Parallel talk at SUSY09, Boston, USA, June 2009, 5 pages

Scientific paper

In the no-scale supergravity global symmetries protect local supersymmetry and a zero value for the cosmological constant. The breakdown of these symmetries, which ensures the vanishing of the vacuum energy density, results in a set of degenerate vacua with broken and unbroken supersymmetry leading to the natural realisation of the multiple point principle (MPP). In the MPP inspired SUGRA models the cosmological constant is naturally tiny.

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