Inflationary Cosmology with Five Dimensional SO(10)

Abstract

We discuss inflationary cosmology in a five dimensional SO(10) model compactified on $S^1/(Z_2\times Z_2^{\prime })$, which yields $SU(3{)}_c\times SU(2{)}_L\times U(1{)}_Y\times U(1{)}_X$ below the compactification scale. The gauge symmetry $SU(5)\times U(1{)}_X$ is preserved on one of the fixed points, while ``flipped'' $SU(5{)}^{\prime }\times U(1{)}_X^{\prime }$ is on the other fixed point. Inflation is associated with $U(1{)}_X$ breaking, and is implemented through $F$-term scalar potentials on the two fixed points. A brane-localized Einstein-Hilbert term allows both branes to have positive tensions during inflation. The scale of $U(1{)}_X$ breaking is fixed from $\delta T/T$ measurements to be around $10^{16}$ GeV, and the scalar spectral index $n=0.98-0.99$. The inflaton field decays into right-handed neutrinos whose subsequent out of equilibrium decay yield the observed baryon asymmetry via leptogenesis.

1+19 pages, improved discussion of 5D cosmology, Version to appear in PRD

References in corpus (4)

• Leptogenesis and Neutrino Oscillations Within A Predictive G(224)/SO(10)-Framework
• A Supersymmetric Standard Model of Inflation with Extra Dimensions
• GUT Scale And Leptogenesis From 5D Inflation
• Neutrino Democracy, Fermion Mass Hierarchies And Proton Decay From 5D SU(5)

Cited by in corpus (11)

• Reheat temperature in supersymmetric hybrid inflation models
• Neutrinos in 5D SO(10) Unification
• Inflation With Realistic Supersymmetric SO(10)
• Flavor hierarchy in SO(10) grand unified theories via 5-dimensional wave-function localization
• Low Energy Consequences of Five Dimensional SO(10)
• Gauge-Fermion Unification and Flavour Symmetry
• $\delta T/T$ and Neutrino Masses in SU(5)
• Brane gravity, massless bulk scalar and self-tuning of the cosmological constant
• Supersymmetric SO(10) And A Prediction For ${\theta }_{13}$
• Supersymmetric SO(10) Models Inspired by Deconstruction
• Inflation and Leptogenesis in Five Dimensional SO(10)