Primordial features as probes of baryogenesis from supersymmetric flat directions
hep-ph, astro-ph.CO
Submitted: 2026-02-09
Updated: 2026-08-31
Comments: 48 + 6 pages, 16 figures; Added finite-temperature effects and origins of non-canonical kinetic couplings. References added. Main conclusion unchanged. Version matched with publication
Journal ref: JCAP08(2026)081
DOI: 10.1088/1475-7516/2026/08/081
License: http://creativecommons.org/licenses/by/4.0/
The gist: The Affleck-Dine mechanism is a leading baryogenesis scenario in which scalar condensates form coherently during inflation along supersymmetric flat directions that are lifted by
Terminology
Abstract
The Affleck-Dine mechanism is a leading baryogenesis scenario in which scalar condensates form coherently during inflation along supersymmetric flat directions that are lifted by supersymmetry-breaking effects. We update the viable parameter space for baryogenesis using recent Cosmic Microwave Background constraints on baryon-density isocurvature perturbations, taking the quantum fluctuations of the scalar condensate generated during inflation as initial conditions. We then show that primordial features arising from the inflaton sector can serve as a unique probe of baryogenesis models, whose mechanisms are otherwise difficult to access directly due to their high energy scales. These primordial features leave correlated imprints, such as sharp feature signals and clock signals, on both the curvature and baryon-density isocurvature perturbations, providing direct evidence for the existence of both light and heavy modes involved in the Affleck-Dine mechanism.
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