1997/11/13 by Chao-Hsi Chang, Hui-Shi Dong, Xi-Chen Feng +3
Physics and Astronomy · #hep-ph
published as Commun.Theor.Phys. 35 (2001) 557-562 · Latex file, 12pages, no figures
arxiv created 1997/11/13 · arxiv updated 2009/11/30
To describe possible effects of medium, besides the hamiltonian introduced by Mikheev, Smirnov and Wolfenstein (MSW), in principle, there may exist new terms in the evolution equation for the neutrino oscillation due to the environment. Considering a two-energy-level quantum system: ν1-ν2, two-species neutrino system which is embedded in a matter environment, we solve the neutrino evolution equation precisely with the possible extra terms, especially, those cause alternations between pure and mixed states of the neutrino quantum system. We obtain some remarkable features for the neutrino oscillations, which are different from that of MSW and accessible to be observed in solar neutrino observation and/or in the planned long-baseline neutrino experiments.