Symmetric and Standard Matter-Neutrino Resonances Above Merging Compact Objects

TL;DR

This paper investigates matter-neutrino resonances in environments like compact object merger disks, identifying two types of resonances that significantly affect neutrino flavor transformation and nucleosynthesis.

Contribution

It introduces the concepts of standard and symmetric MNR in merger disks and analyzes their effects on neutrino flavor transformation and nucleosynthesis outcomes.

Findings

Identification of two distinct MNR types: standard and symmetric.

Analysis of flavor transformation mechanisms in each MNR type.

Implications for nucleosynthesis in merger environments.

Abstract

Matter-neutrino resonances (MNR) can occur in environments where the flux of electron antineutrinos is greater than the flux of electron neutrinos. These resonances may result in dramatic neutrino flavor transformation. Compact object merger disks are an example of an environment where electron antineutrinos outnumber neutrinos. We study MNR resonances in several such disk configurations and find two qualitatively different types of matter-neutrino resonances: a standard MNR and a symmetric MNR. We examine the transformation that occurs in each type of resonance and explore the consequences for nucleosynthesis.