Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/106958
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Type: Journal article
Title: Dark energy density in SUGRA models and degenerate vacua
Author: Froggatt, C.
Nielsen, H.
Nevzorov, R.
Thomas, A.
Citation: International Journal of Modern Physics A, 2017; 32(17):1730013-1-1730013-15
Publisher: World Scientific
Issue Date: 2017
ISSN: 0217-751X
1793-656X
Statement of
Responsibility: 
C.D. Froggatt, H.B. Nielsen, R. Nevzorov, A.W. Thomas
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.
Keywords: Supergravity; cosmological constant; Higgs boson
Description: PDF unavailable
Rights: Copyright© 2017 World Scientific Publishing Co Pte Ltd
RMID: 0030072051
DOI: 10.1142/S0217751X17300137
Grant ID: http://purl.org/au-research/grants/arc/FL0992247
Appears in Collections:Physics publications

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