Helicity of spin-extended chiral particles

M. Elbistan, C. Duval, P. A. Horvathy +1

The helicity of a free massless relativistic particle, ${\chi }^o=\mathbf{s}.\mathbf{p}/|\mathbf{p}|$, is generalized, for a particle in an electromagnetic field, to $\chi =\mathbf{s}.\mathbf{p}/\mathcal{E}$,…