Some Aspects of the Tachyon Inflation with Superpotential in Confrontation with Planck2018 Data

Abstract

We study the tachyon inflation in the presence of the superpotential as an inflationary potential. We study the primordial perturbations and their non-gaussian feature in the equilateral configuration. We use the Planck2018 TT, TE, EE+lowE+lensing+BK14+BAO joint data at $68\%$ CL and $95\%$ CL, to perform numerical analysis on the scalar perturbations and seek for the observational viability of the tachyon inflation with superpotential. We also check the observational viability of the model by studying the tensor part of the perturbations and comparing the results with Planck2018 TT, TE, EE+lowE+lensing+BK14+BAO+ LIGO$\&$Virgo2016 joint data at $68\%$ CL and $95\%$ CL. By studying the phase space of the model's parameters, we predict the amplitude of the equilateral non-gaussianity in this model. The reheating phase after inflation is another issue that is explored in this paper. We show that, in some ranges of the model's parameters, it is possible to have an observationally viable tachyon model with superpotential.

25 pages, 8 figures, 5 tables

References in corpus (14)

• The Effective Field Theory of Inflation
• Observational Signatures and Non-Gaussianities of General Single Field Inflation
• Primordial Non-Gaussianities from Inflation Models
• Nonperturbative Dynamics Of Reheating After Inflation: A Review
• Reheating constraints to inflationary models
• Reheating predictions in single field inflation
• Primordial non-Gaussianities in general modified gravitational models of inflation
• Perturbation, Non-Gaussianity and Reheating in a GB-$\alpha$-Attractor Model
• End of inflation, oscillons and matter-antimatter asymmetry
• Tachyon Field in Intermediate Inflation
• Gauss-Bonnet Inflation after Planck2018
• Tachyon field inflation in the light of BICEP2
• Constraints on tachyon inflationary models with an AdS/CFT correspondence
• Tachyon Mimetic Inflation as an Instabilities-Free Model

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• Viable Anisotropic Inflation and Reheating in the Tachyon Model
• Viable Intermediate Inflation in the Mimetic DBI Model
• Intermediate and Power-Law Inflation in the Tachyon Model with Constant Sound Speed
• A Tachyon Field around the Black Hole