PeV-scale Supersymmetry from New Inflation

TL;DR

This paper proposes a model where heavy supersymmetric particles naturally emerge from a new inflation scenario involving the Higgs boson as the inflaton, with implications for particle physics and cosmology.

Contribution

It introduces a framework linking new inflation with PeV-scale supersymmetry and explores its phenomenological and cosmological consequences.

Findings

Supersymmetric particles around 100 TeV to 1 PeV naturally appear.

The model explains the 125 GeV Higgs boson mass.

Non-thermal leptogenesis occurs automatically.

Abstract

We show that heavy supersymmetric particles around O(100) TeV to O(1) PeV naturally appear in new inflation in which the Higgs boson responsible for the breaking of U(1)B-L plays the role of inflaton. Most important, the supersymmetric breaking scale is bounded above by the inflationary dynamics, in order to suppress the Coleman-Weinberg potential which would otherwise spoil the slow-roll inflation. Our scenario has rich phenomenological and cosmological implications: the Higgs boson mass at around 125 GeV can be easily explained, non-thermal leptogenesis works automatically, the gravitino production from inflaton decay is suppressed, the dark matter is either the lightest neutralino or the QCD axion, and the upper bound on the inflation scale for the modulus stabilization can be marginally satisfied.