Chaotic inflation and a radiatively generated intermediate scale in the supersymmetric standard model

Tony Gherghetta, Gordon L. Kane

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

We consider a phenomenological extension of the minimal supersymmetric standard model which incorporates chaotic inflation and a radiatively generated intermediate mass scale. Initially a period of chaotic inflation is driven by a quartic potential associated with the right-handed electron sneutrino. Supersymmetry relates the quartic coupling of the inflationary potential to the electron Majorana neutrino Yukawa coupling, h1. The microwave background temperature anisotropy determines this coupling to be h1 {reversed tilde equals} 10-7, which is similar in magnitude to the electron Dirac Yukawa coupling. A U(1) Peccei-Quinn (PQ) symmetry is broken by radiative corrections at an intermediate scale {reversed tilde equals} 1012 GeV when the universe cools to a temperature T ≲ 103 GeV. This leads to an invisible axion, a weak scale μ-term and an electron Majorana neutrino mass MN1 {reversed tilde equals} 105 GeV. A second inflationary period can also occur via a flat-direction field. In this case the universe can be reheated to a temperature TRH {reversed tilde equals} 106GeV, without restoring PQ symmetry. Baryogenesis will then occur via out-of-equilibrium neutrino decay.

Original languageEnglish (US)
Pages (from-to)300-306
Number of pages7
JournalPhysics Letters B
Volume354
Issue number3-4
DOIs
StatePublished - Jul 20 1995

Bibliographical note

Funding Information:
R. Watkins for discussions and comments.T his work was supportedi n part by the Departmento f Energy.

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