Axion Potential, Topological Defects and CP-odd Bubbles in QCD

Abstract

It follows on general grounds that the θ dependence in QCD is more complicated than suggested by the large Nc approach or instanton arguments. Generically, the vacuum energy Evac(θ) is a multi-valued function of θ admitting the existence of metastable states. We discuss decays of such metastable vacua in the theory with and without the axion, and point out… (More)

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Cite this paper

@inproceedings{Halperin1998AxionPT, title={Axion Potential, Topological Defects and CP-odd Bubbles in QCD}, author={Igor Halperin and Ariel R. Zhitnitsky}, year={1998} }