Heavy gravitino from dynamical generation of right-handed neutrino mass scale, and gravitational waves

Ryo Nagai, Fuminobu Takahashi, Norimi Yokozaki

Research output: Contribution to journalArticlepeer-review

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∼m3/2. We address the possibility that observable gravitational wave signals might emerge from the domain wall annihilation.

Original languageEnglish
Pages (from-to)37-42
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume784
DOIs
Publication statusPublished - 2018 Sep 10

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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