Retrieving "Peccei Quinn Current" from the archives

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1. Strong Cp Problem

   Linked via "Peccei-Quinn current"

   The Strong $\text{CP}$ Problem is intimately connected with several other areas of physics:
   Cosmological Implications: If axions constitute dark matter, their production mechanism during the early universe imposes constraints on the decay constants $fa$ and the reheating temperature $TR$ following inflation. The theory suggests a period where the axial Peccei-Quinn current oscillates coherently a…