2016/01/20 by Waqas Ahmed, Ommair Ishaque, Mansoor Ur Rehman · 2 citations
Physics and Astronomy · #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #Black Holes and Theoretical Physics
paper · doi:10.1142/s0218271816500358
We study the impact of 1-loop radiative corrections in a nonsupersymmetric model of hybrid inflation (HI) with chaotic (polynomial-like) potential, [Formula: see text]. These corrections can arise from the possible couplings of inflaton with other fields which can play an 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 [Formula: see text] and the tensor to scalar ratio [Formula: see text]. However, the radiatively corrected version of these models, [Formula: see text], is fully consistent with the Planck’s data. More specifically, fermionic radiative correction ([Formula: see text]) reduces the tensor to scalar ratio significantly and a red-tilted spectral index [Formula: see text], consistent with Planck’s data, is obtained even for sub-Planckian field-values.