Browsing by Author "Chen, Liang"
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Chen, Liang; 0000-0002-0224-7598 (2021-07-08)Department: PhysicsThe non-trivial vacuum structure in QCD leads to addition of an extra term to its Lagrangian. This term serves as the source of CP violation in QCD. Introducing a new pseudoscalar particle called axion can retain the CP ...