Pseudosmooth Tribrid Inflation in $SU(5)$

Abstract

A realistic tribrid model of sneutrino inflation is constructed in an $R$-symmetric $SU(5)$ grand unified theory (GUT). To avoid the monopole problem, a pseudosmooth inflationary trajectory is generated with the help of an additional $Z_5$ symmetry which is broken during and after inflation. The predictions of inflationary parameters are made at the central value of the scalar spectral index, $n_s=0.968$. The largest possible value of the tensor to scalar ratio, $r\lesssim 0.0027$, is obtained with sub-Planckian field values ($\lesssim m_P$). A successful realization of reheating and leptogenesis is achieved by avoiding the gravitino problem with a reheat temperature as low as $10^6$ GeV. The predicted range of the gauge symmetry breaking scale, $5\times 10^{16}\lesssim M/\text{GeV}\lesssim 5\times 10^{17}$, turns out to be somewhat larger than the typical GUT scale. With additional vector-like families, a successful gauge coupling unification is achieved by avoiding the no-go theorem related to $R$-symmetric $SU(5)$ GUT.

arXiv comment18 pages, 8 figures, JCAP published version

References in corpus (23)

• Particle Physics Models of Inflation and the Cosmological Density Perturbation
• False Vacuum Inflation with Einstein Gravity
• Big Bang Nucleosynthesis: 2015
• Big-Bang Nucleosynthesis and Hadronic Decay of Long-Lived Massive Particles
• Large Scale Structure and Supersymmetric Inflation without Fine Tuning
• Big-Bang Nucleosynthesis and Gravitino
• Mission design of LiteBIRD
• Hybrid Inflation in Supergravity
• Revisiting Big-Bang Nucleosynthesis Constraints on Long-Lived Decaying Particles
• Search for Proton Decay via $p\to e^{+}{\pi }^0$ and $p\to {\mu }^{+}{\pi }^0$ in 0.31 megaton$\cdot$years exposure of the Super-Kamiokande Water Cherenkov Detector
• Sneutrino Inflation in the Light of WMAP: Reheating, Leptogenesis and Flavour-Violating Lepton Decays
• Reheat temperature in supersymmetric hybrid inflation models
• Supersymmetric Hybrid Inflation Redux
• Sneutrino Hybrid Inflation in Supergravity
• Solving the $\eta$-Problem in Hybrid Inflation with Heisenberg Symmetry and Stabilized Modulus
• SUGRA Hybrid Inflation with Shift Symmetry
• No-go theorems for R symmetries in four-dimensional GUTs
• Inflation in Supersymmetric SU(5)
• Kähler-driven Tribrid Inflation
• Tribrid Inflation in Supergravity
• Simplified Smooth Hybrid Inflation in Supersymmetric SU(5)
• Sneutrino Inflation
• Pseudosmooth Tribrid Inflation

Cited by in corpus (7)

• Sneutrino Tribrid Inflation, Metastable Cosmic Strings and Gravitational Waves
• Probing Stochastic Gravitational Wave Background from $SU(5)\times U(1{)}_{\chi }$ Strings in Light of NANOGrav 15-Year Data
• New Inflation in Supersymmetric SU(5) and Flipped SU(5) GUT Models
• Realistic Inflation in No-Scale $U(1{)}_R$ Symmetric Flipped $SU(5)$
• Radiative Symmetry breaking, Cosmic Strings and Observable Gravity Waves in $U(1{)}_R$ symmetric $SU(5)\times U(1{)}_{\chi }$
• Observable r, Gravitino Dark Matter, and Non-thermal Leptogenesis in No-Scale Supergravity
• Baryogenesis via relativistic bubble expansion