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Composite Hybrid Inflation: Dilaton and Waterfall Pions

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arxiv 2307.01852 v2 pith:SSVAJ7GV submitted 2023-07-04 hep-ph astro-ph.CO

Giacomo Cacciapaglia , Dhong Yeon Cheong , Aldo Deandrea , Wanda Isnard , Seong Chan Park This is my paper · ORCID
classification hep-phastro-ph.CO
keywords inflationpionsscaledilatontheoryanomalouscompositeconstrain
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abstract

We investigate the possibility that inflation originates from a composite field theory, in terms of an effective chiral Lagrangian involving a dilaton and pions. The walking dynamics of the theory constrain the potential in a specific way, where the anomalous dimensions of operators involving pions play a crucial role. For realistic values of the anomalous dimensions, we find a successful hybrid inflation occurring via the dilaton-inflaton, with the pions acting as waterfall fields. Compositeness consistency strongly constrain the model, predicting a dilaton scale $f_\chi \sim \mathcal{O} (1)$ in unit of the Planck scale, an inflation scale $H_\text{inf} \sim 10^{10}$ GeV, and the pion scale around $10^{14}$ GeV. We further discuss possible phenomenological consequences of this theory.

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Cited by 6 Pith papers

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