Reheating constraints on mutated hilltop inflation

Abstract

Future research studies of cosmic microwave background polarization seems likely to provide a more improved upper bound of $r\le 0.03$ on the tensor-to-scalar ratio(r). In our work, we have done the reheating study of mutated hilltop inflation(MHI), a model falling in the broad category of small field inflation. We have parameterized reheating in terms of various parameters like reheating duration $N_{\text{rh}}$, reheating temperature $T_{\text{rh}}$ and effective equation of state ${\overline{\omega }}_{\text{rh}}$ using observationally viable values of scalar power spectrum amplitude $A_{\text{s}}$ and scalar spectral index $n_{\text{s}}$. In our study, working over a range of ${\overline{\omega }}_{\text{rh}}$, we found that the MHI potential is well consistent with combined Planck and BK18 observations for ${\overline{\omega }}_{\text{rh}}>0$ within a particular range of model's parameter space and the lower values of the model parameter in MHI generate considerably smaller r compared to normal hilltop potential without any incompatibility of $n_s$ with observational data, making MHI a better choice in accordance to recent and future studies.

References in corpus (14)

• BICEP / Keck XIII: Improved Constraints on Primordial Gravitational Waves using Planck, WMAP, and BICEP/Keck Observations through the 2018 Observing Season
• Reheating in Inflationary Cosmology: Theory and Applications
• Reheating constraints to inflationary models
• Improved limits on the tensor-to-scalar ratio using BICEP and Planck
• Reheating predictions in single field inflation
• More hilltop inflation models
• Inflation over the hill
• The Lyth Bound of Inflation with a Tilt
• BICEP2 implications for single-field slow-roll inflation revisited
• An analytic treatment of Quartic Hilltop Inflation
• Quartic hilltop inflation revisited
• Generalized Hilltop Inflation
• Running primordial perturbations: Inflationary Dynamics and Observational Constraints
• Reheating constraints on modified quadratic chaotic inflation

Cited by in corpus (4)

• Reheating study of Mexican-Hat-type Potentials
• Reheating and relic gravitational waves as remedies for degeneracies of non-canonical natural inflation
• Mutated hilltop inflation in light of Planck/ACT observations
• Hamilton-Jacobi analysis of noncanonical inflation in $f(R,T)$ gravity: Constraints from Planck/ACT data, and theoretical bounds