Just a simple question -- can the dimension of coupling constant be a rational number or should it always be an integer?
The question arose when I was trying to construct a Lagrangian with an interaction term involving two spin-1 particles and a fermion. The dimensions add up to 7/2, which leaves 1/2 for the coupling.
The question arose when I was trying to construct a Lagrangian with an interaction term involving two spin-1 particles and a fermion. The dimensions add up to 7/2, which leaves 1/2 for the coupling.