Dark Energy density in models with Split Supersymmetry and degenerate vacua

TL;DR

This paper explores how degenerate vacua in supergravity models with Split Supersymmetry can naturally explain the observed dark energy density, linking high-scale SUSY breaking to cosmological constant values.

Contribution

It proposes a mechanism connecting degenerate vacua in supergravity with the observed dark energy, specifically within the Split SUSY framework at a high SUSY breaking scale.

Findings

Dark energy density can be explained by degenerate vacua in supergravity models.

SUSY breaking scale around 10^{10} GeV reproduces observed dark energy.

Degenerate vacua scenario links particle physics with cosmological observations.

Abstract

In N=1 supergravity supersymmetric (SUSY) and non-supersymmetric Minkowski vacua originating in the hidden sector can be degenerate. In the supersymmetric phase in flat Minkowski space non-perturbative supersymmetry breakdown may take place in the observable sector, inducing a non-zero and positive vacuum energy density. Assuming that such a supersymmetric phase and the phase in which we live are degenerate, we estimate the value of the cosmological constant. We argue that the observed value of the dark energy density can be reproduced in the Split-SUSY scenario of the supersymmetry breaking if the SUSY breaking scale is of order of 10^{10} GeV.