Neutrino Oscillation and Magnetic Moment from $\nu - e^{-}$ Elastic Scattering

We discuss how the measurement of the $\bar{\nu}_{e}-e^{-}$ elastic cross section at reactor energies can be used to extract new information on the neutrino oscillation parameters. We also consider the magnetic moment contribution and show how both effects tend to cancel each other when the total cross section is measured; to achieve the separation of each of the effects, experiments capable of measuring angular and energy distributions with respect to the outgoing electron become necessary. We study how their different energy and angle dependence enables such a separation; then, the sensitivity to magnetic moments, masses and mixings is discussed. We also show how these experiments can be sensitive to the magnetic moment of $\tau$ neutrinos via $\bar{\nu}_{e}\leftrightarrow \bar{\nu}_{\mu}$ oscillation.