Abstract
I give an overview of recent developments in the study of the coupling of the QCD axion to nucleons and other octet baryons. I demonstrate how axions can be included into heavy baryon chiral perturbation theory, and present recent numerical results for the several axion-baryon couplings in SU(2) and SU(3) chiral perturbation theory for the Kim–Shifman–Vainstein–Zakharov (KSVZ) and the Dine–Fischler–Srednicki–Zhitnitsky (DFSZ) axion model.
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