It is shown that possible observation by direct kinematical means of a neutrino moving faster than the conventional velocity of light, $c$ could be an indication of dark matter bathing the Earth. In such a situation, the conventional velocity of light would be interpreted as the velocity of light in dark matter. The larger “true velocity” of light in vacuum is designated, $c_t$.

• Received 20 January 2012

DOI:https://doi.org/10.1103/PhysRevD.85.093008