Quantum Smearing in Hybrid Inflation with Chaotic Potentials

Abstract

We study the impact of one-loop radiative corrections in a non-supersymmetric model of hybrid inflation with chaotic (polynomial-like) potential, $V_0+{\lambda }_p{\varphi }^p$. These corrections can arise from the possible couplings of inflaton with other fields which may play active role in the reheating process. The tree-level predictions of these models are shown to lie outside of the Planck's latest bounds on the scalar spectral index $n_s$ and the tensor to scalar ratio $r$. However, the radiatively corrected version of these models, $V_0+{\lambda }_p{\varphi }^p+A{\varphi }^4\ln \varphi$, is fully consistent with the Planck's data. More specifically, fermionic radiative correction ($A<0$) reduces the tensor to scalar ratio significantly and a red-tilted spectral index $n_s<1$, consistent with Planck's data, is obtained even for sub-Planckian field-values.

14 pages, 25 figures (typos fixed)

References in corpus (7)

• Chaotic inflation, radiative corrections and precision cosmology
• Non-Minimal Two-Loop Inflation
• Does Planck really rule out monomial inflation?
• Hybrid Inflation Revisited in Light of WMAP5
• Gravity Waves From Non-Minimal Quadratic Inflation
• Upper Bound on the Tensor-to-Scalar Ratio in GUT-Scale Supersymmetric Hybrid Inflation
• Higgs Inflation, Quantum Smearing and the Tensor to Scalar Ratio

Cited by in corpus (3)

• Primordial Black Holes and Gravitational Waves in Hybrid Inflation with Chaotic Potentials
• Reheating constraints on modified quadratic chaotic inflation
• New Inflation in Waterfall Region