section_path: Interaction types
section_name: Interaction types
paragraph_text: Interaction types
  
  There are two types of weak interaction (called vertices). The first type is called the " charged-current interaction " because the weakly interacting fermions form a current with total electric charge that is nonzero. The second type is called the " neutral-current interaction " because the weakly interacting fermions form a current with total electric charge of zero. It is responsible for the (rare) deflection of neutrinos. The two types of interaction follow different selection rules. This naming convention is often misunderstood to label the electric charge of the W and Z bosons, however the naming convention predates the concept of the mediator bosons, and clearly (at least in name) labels the charge of the current (formed from the fermions), not necessarily the bosons.