Effects of energy-dependent scatterings on fast neutrino flavor conversions

Understand

Neutrino self-interactions in a dense neutrino gas can induce collective neutrino flavor conversions.

• Fast neutrino flavor conversions (FFCs), one of the collective neutrino conversion modes, potentially change the dynamics and observables in core-collapse supernovae and binary neutron star mergers.
• In cases without neutrino-matter interactions (or collisions), FFCs are essentially energy-independent, and therefore the single energy treatment has been used in previous studies.
• However, neutrino-matter collisions in general depend on neutrino energy, suggesting that energy-dependent features may emerge in FFCs with collisions.