Froggatt, C.D., Nielsen, H.B., Nevzorov, R. and Thomas, A.W. (2018) Dark energy xensity in SUGRA models and degenerate vacua. In: Fritzsch, H. (ed.) Cosmology, Gravitational Waves and Particles. World Scientific, pp. 61-75. ISBN 9789813231795 (doi: 10.1142/9789813231801_0007)
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Abstract
In N = 1 supergravity the tree-level scalar potential of the hidden sector may have a minimum with broken local supersymmetry (SUSY) as well as a supersymmetric Minkowski vacuum. These vacua can be degenerate, allowing for a consistent implementation of the multiple point principle. The first minimum where SUSY is broken can be identified with the physical phase in which we live. In the second supersymmetric phase, in flat Minkowski space, SUSY may be broken dynamically either in the observable or in the hidden sectors inducing a tiny vacuum energy density. We argue that the exact degeneracy of these phases may shed light on the smallness of the cosmological constant. Other possible phenomenological implications are also discussed. In particular, we point out that the presence of such degenerate vacua may lead to small values of the quartic Higgs coupling and its beta function at the Planck scale in the physical phase.
| Item Type: | Book Sections |
|---|---|
| Status: | Published |
| Glasgow Author(s) Enlighten ID: | Froggatt, Professor Colin |
| Authors: | Froggatt, C.D., Nielsen, H.B., Nevzorov, R., and Thomas, A.W. |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Publisher: | World Scientific |
| ISBN: | 9789813231795 |
| Published Online: | 20 November 2017 |
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