Why have supersymmetric particles not been observed?

TL;DR

This paper proposes that supersymmetric particles are undetected because the fundamental cut-off scale is below the Planck scale, with implications for dark matter and baryogenesis.

Contribution

It introduces a model where a lower cut-off scale explains the non-observation of supersymmetric particles and addresses related cosmological issues.

Findings

Supersymmetric particles are predicted in the TeV range.

The gravitino is the LSP with a mass around 100 GeV.

The model solves the cosmological moduli problem.

Abstract

If low-energy supersymmetry is the solution to the hierarchy problem, it is a puzzle why supersymmetric particles have not been observed experimentally to date. We show that supersymmetric particles in the TeV region can be explained if the fundamental cut-off scale of the theory is smaller than the 4-dimensional Planck scale and if thermal leptogenesis is the source of the observed baryon asymmetry. The supersymmetric particles such as sfermions and gauginos are predicted to be in the TeV region, while the gravitino is the LSP with mass of O(100)GeV and is a good candidate for dark matter. Interestingly, the cosmological moduli problem can be solved in the theory with the low cut-off scale.