Helicity Basis for Spin 1/2 and 1

Valeri V. Dvoeglazov, J. L. Quintanar Gonzalez

We study the theory of the (1/2,0)+(0,1/2) and (1,0)+(0,1) representations in the helicity basis. The helicity eigenstates are not the parity eigenstates. This is in accordance wit…