Inflation in Supersymmetric SU(5)

Abstract

We analyze the adjoint field inflation in supersymmetric (SUSY) SU(5) model. In minimal SUSY SU(5) hybrid inflation monopoles are produced at the end of inflation. We therefore explore the non-minimal model of inflation based on SUSY SU(5), like shifted hybrid, which provides a natural solution for the monopole problem. We find that the supergravity corrections with non-minimal Kahler potential are crucial to realize the central value of the scalar spectral index n_s ~ 0.96 consistent with the seven year WMAP data. The tensor to scalar ratio r is quite small, taking on values r < 10^{-5}. Due to R-symmetry massless SU(3) octet and SU(2) triplet Higgs bosons are present and could spoil for gauge coupling unification. To keep gauge coupling unification intact, light vector-like particles are added which are expected to be observed at LHC.

16 pages

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Cited by in corpus (24)

• The hybrid inflation waterfall and the primordial curvature perturbation
• Upper Bound on the Tensor-to-Scalar Ratio in GUT-Scale Supersymmetric Hybrid Inflation
• Red Spectral Tilt and Observable Gravity Waves in Shifted Hybrid Inflation
• Probing Stochastic Gravitational Wave Background from $SU(5)\times U(1{)}_{\chi }$ Strings in Light of NANOGrav 15-Year Data
• Simplified Smooth Inflation with Observable Gravity Waves
• From Hybrid to Quadratic Inflation With High-Scale Supersymmetry Breaking
• Simplified Smooth Hybrid Inflation in Supersymmetric SU(5)
• Pseudosmooth Tribrid Inflation in $SU(5)$
• New Inflation in Supersymmetric SU(5) and Flipped SU(5) GUT Models
• Inflation, Leptogenesis, and Yukawa Quasi-Unification within a Supersymmetric Left-Right Model
• Single Field Inflation in Supergravity with a $U(1)$ Gauge Symmetry
• Pseudosmooth Tribrid Inflation
• Implementing Hilltop F-term Hybrid Inflation in Supergravity
• Exploring primordial black holes and gravitational waves with R-symmetric GUT Higgs inflation
• Smooth Hybrid Inflation with Low Reheat Temperature and Observable Gravity Waves in $SU(5)\times U(1{)}_{\chi }$ Super-GUT
• Radiative Symmetry breaking, Cosmic Strings and Observable Gravity Waves in $U(1{)}_R$ symmetric $SU(5)\times U(1{)}_{\chi }$
• Higgs mass and inflation
• Observable r, Gravitino Dark Matter, and Non-thermal Leptogenesis in No-Scale Supergravity
• Phase transition and monopole production in supergravity inflation
• Supersymmetric $SU(5)\times U(1{)}_{\chi }$ and the Weak Gravity Conjecture
• E- & T-Model Hybrid Inflation
• Smooth $\mu$-Hybrid and Non-Minimal Higgs Inflation in $SU(4{)}_C\times SU(2{)}_L\times SU(2{)}_R$ With Observable Gravitational Waves
• Supersymmetric hybrid inflation and current-carrying metastable cosmic strings in $SU(4{)}_c\times SU(2{)}_L\times U(1{)}_R$
• Modified hybrid inflation in no-scale SUGRA with suppressed $R$-symmetry breaking