Implications of gravitational instantons for the strong CP problem and axions
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Type
ThesisThesis type
Doctor of PhilosophyAuthor/s
Chen, ZheAbstract
We have proposed an extension of the standard Peceei-Quinn mechanism to provide a genuine solution to the strong CP problem. This extension introduces an additional axion field, a companion to the standard QCD axion. Our model offers a rich and interesting phenomenology that is studied in this thesis. In particular by reviewing constraints on axionphoton couplings, quite remarkably we find that future axion searches with haloscopes and helioscopes may well discover two QCD axions, perhaps even within the same experiment.We have proposed an extension of the standard Peceei-Quinn mechanism to provide a genuine solution to the strong CP problem. This extension introduces an additional axion field, a companion to the standard QCD axion. Our model offers a rich and interesting phenomenology that is studied in this thesis. In particular by reviewing constraints on axionphoton couplings, quite remarkably we find that future axion searches with haloscopes and helioscopes may well discover two QCD axions, perhaps even within the same experiment.
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Date
2024Licence
Copyright All Rights ReservedRights statement
The author retains copyright of this thesis. It may only be used for the purposes of research and study. It must not be used for any other purposes and may not be transmitted or shared with others without prior permission.Faculty/School
Faculty of Science, School of PhysicsAwarding institution
The University of SydneyShare