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

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

1995-04-28

arxiv.org/abs/hep-ph/9504420v2

Phys.Lett. B354 (1995) 300-306

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, LaTeX ; minor corrections and reference addition, to appear in Phys. Lett. B

Scientific paper

10.1016/0370-2693(95)00620-Z

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, $h_1$. The microwave background temperature anisotropy determines this coupling to be $h_1\simeq 10^{-7}$, 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 $\simeq 10^{12}$GeV when the universe cools to a temperature $T\lesssim 10^3$GeV. This leads to an invisible axion, a weak scale $\mu$-term and an electron Majorana neutrino mass $M_{N_1}\simeq 10^5$GeV. A second inflationary period can also occur via a flat-direction field. In this case the universe can be reheated to a temperature $T_{RH}\simeq 10^6$GeV, without restoring PQ symmetry. Baryogenesis will then occur via out-of-equilibrium neutrino decay.

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