Neutrino Oscillation & Hydrodynamics

I have recently been working on a project designed to couple the effects of neutrino oscillations into the hydrodynamic evolution of a 1D Core-Collapse Supernova. We have done this by combining the SQA neutrino oscillation code developed by Dr. Kneller with the 1D Supernova code Agile-BOLTZTRAN. This combined code now self-consistently applies the dynamic oscillation calculations to the neutrino transport giving us the ability to examine the effects of neutrino oscillation on the neutrino heating and shock evolution for the first time.

The hybrid (quantum-classical) transport scheme is achieved by introducing the oscillations as an additional opacity term. Neutrino number is conserved by coupling the absorption of one neutrino flavor from this oscillation opacity directly to the emission of the other neutrino flavor (2-flavors in BOLTZTRAN). These effective rates are then determined based on the transition probabilities from the oscillation calculations.

We have recently submitted this work to Physical Review Letters for peer-review, as well as on the arXiv.