#Interaction Categories

We categorize SDFFs into the following interaction types:

1. Axial-vector and vector interactions

   • axial-vector/vector

   • axial-vector/axial-vector

   • vector/vector

2. Scalar and pseudoscalar interactions

   • pseudoscalar/scalar

   • pseudoscalar/pseudoscalar

   • scalar/scalar

3. Tensor and pseudotensor interactions

   • tensor/tensor

   • pseudotensor/tensor

   • pseudotensor/pseudotensor

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