CONSEQUENCES OF A NEUTRINO MAGNETIC-MOMENT IN INELASTIC NEUTRINO REACTIONS

For any inelastic neutrino interaction nu + A --> 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 --> 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 --> 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 + atom --> nu + atom + gamma.