Stopping of neutrinos in a material medium
Kirzhnits D.A., Losyakov V. V., Chechin V. A.
A universal upper limit is found on the energy loss of neutrinos in an arbitrary equilibrium medium (which is assumed for simplicity to be cold, nonrelativistic, homogeneous, and isotropic). This upper limit rules out the possibility of an anomalously pronounced stopping of neutrinos.