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arXiv · 2412.14823

Baryonic Axion in neutron-antineutron oscillation

Théo Brugeat
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Abstract

The accidental baryonic symmetry is expected to be broken and required from the observed matter-antimatter asymmetry. The neutron-antineutron oscillating system is the hallmark of $\Delta \mathcal{B} = 2$ models which have the benefits of not inducing proton decay. We study this system in a framework allowing the most general couplings to understand how a dark matter candidate such as the axion may couple to the oscillation. In particular a Rabi resonance phenomenon occurs, and this effect is unconstrained for Axion Like Particles (ALPs) models. Regarding the QCD axion, its Goldstone nature leads to a robust exclusion of the majority of scenarios allowed.

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Théo Brugeat. 2024-12-19. Baryonic Axion in neutron-antineutron oscillation. https://arxiv.org/abs/2412.14823

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