In the presence of fluid helicity $\boldsymbol{v} \cdot \boldsymbol{\omega}$, magnetic field induces an electric current form $\boldsymbol{j} = C_{\rm HME} (\boldsymbol{v} \boldsymbol{\omega}) \boldsymbol{B}$. This is helical effect (HME). We show that for massless Dirac fermions with charge $e=1$, transport coefficient $C_{\rm HME}$ fixed by chiral anomaly $C=1/(2\pi^2)$ as C/2$ independently ...

The hyperfine anomaly has been primarily considered as a parameter of interest in connection with nuclear dipole moment theory. It is shown that the present state of the theory of the effect limits this application. In contrast the comparison of anomaly measurements in different electronic environments yields information concerning the origin of magnetic hyperfine interactions without requiring...