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't Hooft mechanism, anomalous gauge U(1), and "invisible" axion from string
Jihn E. Kim
Among solutions of the strong CP problem, the "invisible" axion in the narrow axion window is argued to be the remaining possibility among natural solutions on the smallness of $\b…
Strong CP problem, axions, and cosmological implications of CP violation
Jihn E. Kim
In this talk, I present a pedagogical and historical review related to the CP symmetry. It includes the weak CP violation, the strong CP problem, "invisible" axions and cosmology,…
Naturally realized two dark Z's near the electroweak scale
Jihn E. Kim
Chiral representations are the key in obtaining light fermions from some ultra-violet completed theories. The well-known chiral example is one family set of fifteen chiral fields i…
The anomalous U(1) global symmetry and flavors from an SU(5) x SU(5) GUT in orbifold compactification
Jihn E. Kim, Bumseok Kyae, Soonkeon Nam
In string compactifications, frequently there appears the anomalous U(1) gauge symmetry which belonged to E8E8 of the heterotic string. This anomalous U(1) gauge boson obta…