Dr. Basudeb Dasgupta (Tata institute)
" Temporal Instability of Supernova Neutrinos "
The flavor composition of a dense gas of neutrinos changes in a complicated fashion. This phenomenon, called collective effects, still remains poorly understood. In the past decade, many insights into this problem have been obtained based on an assumption of steady state conditions. We will show that the steady state is unstable, and such instability can arise at very high density. This may have major implications for flavor oscillations in a supernova and the neutrino mechanism of supernova explosions.