Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/124499
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Type: Journal article
Title: Predicting the SUSY breaking scale in SUGRA models with degenerate vacua
Author: Froggatt, C.D.
Nevzorov, R.
Nielsen, H.B.
Thomas, A.W.
Citation: International Journal of Modern Physics A, 2020; 35(1):1-14
Publisher: World Scientific
Issue Date: 2020
ISSN: 0217-751X
1793-656X
Statement of
Responsibility: 
C.D. Froggatt, R. Nevzorov, H.B. Nielsen, A.W. Thomas
Abstract: In N=1 supergravity, the scalar potential may have supersymmetric (SUSY) and non-supersymmetric Minkowski vacua (associated with supersymmetric and physical phases) with vanishing energy density. In the supersymmetric Minkowski (second) phase, some breakdown of SUSY may be induced by nonperturbative effects in the observable sector that give rise to a tiny positive vacuum energy density. Postulating the exact degeneracy of the physical and second vacua as well as assuming that at high energies the couplings in both phases are almost identical, one can estimate the dark energy density in these vacua. It is mostly determined by the SUSY breaking scale MS in the physical phase. Exploring the two-loop renormalization group (RG) flow of couplings in these vacua, we find that the measured value of the cosmological constant can be reproduced if MS varies from 20 TeV to 400 TeV. We also argue that this prediction for the SUSY breaking scale is consistent with the upper bound on MS in the higgsino dark matter scenario.
Keywords: Supergravity; supersymmetry; cosmological constant; dark matter
Rights: © World Scientific Publishing Company
RMID: 1000013968
DOI: 10.1142/S0217751X20500074
Grant ID: http://purl.org/au-research/grants/arc/CE110001104
Appears in Collections:Physics publications

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