Dirac and Majorana neutrinos in matter

摘要

We consider the matter effects on neutrinos moving in background on the basis of the corresponding quantum wave equations. Both Dirac and Majorana neutrino cases are discussed. The effects for Dirac neutrino reflection and trapping as well as neutrino-antineutrino annihilation and v(v) over bar pair creation in matter at the interface between two media with different densities are considered. The spin light of neutrinos in matter is also discussed.