The mean free path of neutrino-free electron gas interaction has been calculated by taking into account the neutrino electromagnetic form factors and the possibility of neutrino oscillation. It is shown that the form factor effect becomes significant for a neutrino magnetic moment ${\mu }_{\nu }\ge {10}^{-10}{\mu }_B$ and for a neutrino radius $R\ge {10}^{-6}{\mathrm{M}\mathrm{e}\mathrm{V}}^{-1}$. The mean free path is found to be sensitive to the ${\nu }_e-{\nu }_{\mu }$ and ${\nu }_e-{\nu }_e^R$ transition probabilities.

• Received 25 August 2004

DOI:https://doi.org/10.1103/PhysRevD.71.017303