Brane inflation driven by an arctan potential: CMB constraints and Reheating

Abstract

We investigate the early universe evolution in the context of brane inflation driven by a supergravity-inspired $\arctan$ potential. We performed a slow-roll and a semi-analytical reheating analyses and obtained constraints on the inflationary parameters in agreement with Planck 2018 data. We also employed a Markov Chain Monte Carlo analysis to perform a parameter estimation of the cosmological parameters, obtaining results in good agreement with the currently available cosmic microwave background and baryon acoustic oscillation data. This work establishes the general theoretical predictions of the $\arctan$ model, with the results of the statistical analysis corroborating its observational viability.

arXiv comment14 pages, 7 figures, 2 tables; typos corrected, one reference added; new section added and new results obtained; 3 new references. Published in JCAP

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• Inflationary interpretation of the stochastic gravitational wave background signal detected by pulsar timing array experiments
• $\alpha$-attractor inflation: Models and predictions
• Flat and bent branes in Born-Infeld-like scalar field models