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Coleman-Weinberg potential in good agreement with WMAP

Q. Shafi* and V. N. Şenoğuz†

  • Bartol Research Institute, Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716, USA

  • *Electronic address: shafi@bartol.udel.edu
  • †Electronic address: nefer@udel.edu
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Phys. Rev. D 73, 127301 – Published 5 June, 2006

DOI: https://doi.org/10.1103/PhysRevD.73.127301

Abstract

We briefly summarize and update a class of inflationary models from the early eighties based on a quartic (Coleman-Weinberg) potential for a gauge singlet scalar (inflaton) field. For vacuum energy scales comparable to the grand unification scale, the scalar spectral index ns≃0.94–0.97, in very good agreement with the WMAP 3-year results. The tensor-to-scalar ratio r≲0.14 while α≡dns/dlnk is ≃−10−3. An SO(10) version naturally explains the observed baryon asymmetry via nonthermal leptogenesis.

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Phys. Rev. D 73, 127301– Published 5 June, 2006
  • Received 20 April 2006

© 2006 American Physical Society

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