Grand unified inflation confronts WMAP
Abstract
In a class of realistic four and five dimensional supersymmetric grand unified models, the scalar spectral index is found to be ns = 0.98(+/-0.01), in excellent agreement with the values determined by several previous experiments and most recently by the Wilkinson Microwave Anisotropy Probe (WMAP). The models predict dns/dlnk ~ 10-3 and a negligible tensor-to-scalar ratio r ~ 10-8. A new five dimensional supersymmetric SO(10) model along these is presented in which inflation is associated with the breaking of SO(10) to SU(5) at scale M, with deltaT/Tpropto(M/MPlanck)2, so that M simeq 1016 GeV. The inflaton decay leads to the observed baryon asymmetry via leptogenesis. We also discuss how the monopole problem is solved without the use of non-renormalizable terms.
- Publication:
-
Journal of High Energy Physics
- Pub Date:
- November 2003
- DOI:
- 10.1088/1126-6708/2003/11/036
- arXiv:
- arXiv:astro-ph/0302504
- Bibcode:
- 2003JHEP...11..036K
- Keywords:
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- Field Theories in Higher Dimensions Supersymmetric Effective Theories Cosmology of Theories beyond the SM;
- Astrophysics;
- High Energy Physics - Phenomenology
- E-Print:
- A new resolution of the monopole problem proposed. 1+9 pages