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arXiv · 2508.16144

Reheating study of Mexican-Hat-type Potentials

Sudhava Yadav·Akash Yadav·K. K. Venkataratnam
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Abstract

We study reheating in Mexican Hat type potentials, emphasizing the role of the post-inflationary equation-of-state parameter($\overline{\omega }_{\text{re}}$) in shaping observable predictions. By exploring the allowed range of $\overline{\omega }_{\text{re}}$, we derive reheating temperature, e-fold counts, and inflationary observables, showing that the conventional Mexican Hat model satisfies Planck18+BK18+BAO constraints on $n_s$ and r. The analysis underscores reheating as a critical link between theoretical potentials and CMB data. In addition, the holographic Mexican Hat realization is examined as a benchmark, with our results mapping its phenomenological boundaries. This work illustrates how reheating studies sharpen constraints and guide refinements of unified inflationary scenarios.

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Sudhava Yadav, Akash Yadav, K. K. Venkataratnam. 2025-08-22. Reheating study of Mexican-Hat-type Potentials. https://doi.org/10.1088/1475-7516%2F2026%2F02%2F049

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