Hadronic atoms

Akaki Rusetsky

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arXiv · 2412.13027

Hadronic atoms

Akaki Rusetsky

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Abstract

We give a brief survey of the theory of hadronic atoms, which represent important sources of information for studying hadron interactions at very low energy. It will be namely demonstrated that a systematic expansion of the observables of hadronic atoms (the energy levels and the decay width) in terms of the fine-structure constant can be obtained, using the framework of non-relativistic effective Lagrangians. We also present a pedagogical introduction to the non-relativistic effective theories that includes a review of the main concepts, such as the scale separation, construction of the Lagrangian, power counting and matching.

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Akaki Rusetsky. 2024-12-17. Hadronic atoms. https://arxiv.org/abs/2412.13027

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