For any inelastic neutrino interaction $\nu +A\to \nu +X$, the presence of a neutrino magnetic moment adds to the normal cross section an amount that is calculable in terms of the virtual photon process ${\gamma }^{*}+A\to X$. In particular, there is a correction to the neutrino forward-scattering theorem expressible in terms of the neutrino magnetic moment and the photoproduction cross section $\gamma +A\to X$. There is an effect on the neutral current to charged current ratio at high energies. Effects also occur in the interaction of low-energy neutrinos with atoms; this is illustrated for the coherent process $\nu +\mathrm{atom}\to \nu +\mathrm{atom}+\gamma$.

• Received 21 April 1992

DOI:https://doi.org/10.1103/PhysRevD.46.2252