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 $n_s=0.98(\pm 0.01)$, in excellent agreement with the values determined by several previous experiments and most recently by the Wilkinson Microwave Anisotropy Probe (WMAP). The models predict $d{n}_s/d\ln k\sim 10^{-3}$ and a negligible tensor-to-scalar ratio $r\sim 10^{-8}$. 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 $\delta T/T\propto (M/M_{\mathrm{Planck}}{)}^2$, so that $M\simeq 10^{16}$ 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.

A new resolution of the monopole problem proposed. 1+9 pages

References in corpus (10)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Implications for Inflation
• Reconstructing the primordial power spectrum
• SO(10) grand unification in five dimensions: Proton decay and the mu problem
• Unification in 5D SO(10)
• Testing Supersymmetric Grand Unified Models of Inflation
• Lifting a Realistic SO(10) Grand Unified Model to Five Dimensions
• GUT Scale And Leptogenesis From 5D Inflation
• Inflation and Leptogenesis in Five Dimensional SO(10)

Cited by in corpus (17)

• Cosmological parameters from SDSS and WMAP
• Particle physics models of inflation and curvaton scenarios
• Effective Field Theories and Inflation
• Reconstructing the Primordial Spectrum from WMAP Data by the Cosmic Inversion Method
• Smooth hybrid inflation in supergravity with a running spectral index and early star formation
• Band-power reconstruction of the primordial fluctuation spectrum by the maximum likelihood reconstruction method
• Reconstruction of the primordial fluctuation spectrum from the five-year WMAP data by the cosmic inversion method with band-power decorrelation analysis
• Inflation With Realistic Supersymmetric SO(10)
• Reconstructing the Primordial Spectrum with CMB Temperature and Polarization
• Low Energy Consequences of Five Dimensional SO(10)
• Features of warped geometry in presence of Gauss-Bonnet coupling
• Supergravity Minimal Inflation and its Spectral Index Revisited
• Running spectral index from shooting-star moduli
• $\delta T/T$ and Neutrino Masses in SU(5)
• Decoupling, Trans-Planckia and Inflation
• Inflation and Leptogenesis in Five Dimensional SO(10)
• WMAP constraint on the P-term inflationary model