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arXiv · 1501.00173

Quantum Smearing in Hybrid Inflation with Chaotic Potentials

Waqas Ahmed·Ommair Ishaque·Mansoor Ur Rehman
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Abstract

We study the impact of one-loop radiative corrections in a non-supersymmetric model of hybrid inflation with chaotic (polynomial-like) potential, $V_0 + λ_p ϕ^p$. 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 + λ_p ϕ^p + A ϕ^4 \ln ϕ$, is fully consistent with the Planck's data. More specifically, fermionic radiative correction ($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.

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Waqas Ahmed, Ommair Ishaque, Mansoor Ur Rehman. 2015-06-07. Quantum Smearing in Hybrid Inflation with Chaotic Potentials. https://doi.org/10.1142/s0218271816500358

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