- #1
captain
- 164
- 0
i am confused why you need to write psi-bar multiplied by psi (where psi-bar is the hermitian conjugate of psi multiplied by y_0 (dirac matrix or gamma matrix)) instead of the h.c. psi multiplied by psi in order for it to transform as a lorentz scalar.
Note: h.c. means hermitian conjugate
Note: h.c. means hermitian conjugate