Heavy Gravitino from Dynamical Generation of Right-Handed Neutrino Mass Scale, and Gravitational Waves

Abstract

The absence of supersymmetric particles at the weak scale is a puzzle if supersymmetry solves the gauge hierarchy problem. We show that, if the right-handed neutrino masses arise from hidden gaugino condensation via GUT-suppressed operators, successful thermal leptogenesis leads to the lower bound on the gravitino mass, which may explain the little hierarchy problem. If domain walls associated with the gaugino condensation are formed after inflation, they annihilate when $H\sim m_{3/2}$. We address the possibility that observable gravitational wave signals might emerge from the domain wall annihilation.

15 pages, 4 figures

References in corpus (11)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• Big-Bang Nucleosynthesis and Gravitino
• GW170817: Implications for the Stochastic Gravitational-Wave Background from Compact Binary Coalescences
• Moduli-Induced Gravitino Problem
• Axion cosmology with long-lived domain walls
• A unique Z_4^R symmetry for the MSSM
• Gravitational Waves as a Probe of the Gravitino Mass
• Why have supersymmetric particles not been observed?
• Leptogenesis after Chaotic Sneutrino Inflation and the Supersymmetry Breaking Scale
• Viable Chaotic Inflation as a Source of Neutrino Masses and Leptogenesis