Inflection-Point Inflation with Axion Dark Matter in light of Trans-Planckian Censorship Conjecture

Abstract

Motivated by the recently proposed Trans-Planckian Censorship Conjecture (TCC), we propose a gauged $B-L$ model of inflection-point inflation with axion dark matter. The Hubble scale during inflation ($H_{\inf }$) satisfies the TCC bound of $H_{\inf }\lesssim 1$ GeV, the axion dark matter scenario is free from the axion domain wall and isocurvature problems, and the axion decay constant can be larger than $10^{12}$ GeV. The seesaw mechanism is automatically incorporated in the model and the observed baryon asymmetry of the universe can be reproduced via resonant leptogenesis.

arXiv comment6 pages, 2 figures, revised Section V

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• Hitchhiker's Guide to the Swampland: The Cosmologist's Handbook to the string-theoretical Swampland Programme
• Trans-Planckian Censorship Conjecture and Early Universe Cosmology
• Large Field Polynomial Inflation in Palatini $f(R,\varphi )$ Gravity