Neutrino oscillations above black hole accretion disks: disks with electron-flavor emission

TL;DR

This paper investigates neutrino flavor transformations above black hole accretion disks with electron-flavor emission, revealing how disk geometry affects neutrino behavior and impacts nucleosynthesis in disk winds.

Contribution

It demonstrates that neutrino flavor transformation phenomenology in accretion disks shares similarities with supernovae but exhibits unique behaviors due to disk geometry, affecting nucleosynthesis outcomes.

Findings

Neutrino flavor transformations are influenced by disk geometry.

Transformation behaviors differ from supernova cases.

Nucleosynthesis in disk winds is significantly affected.

Abstract

Black hole accretion disks can form through the collapse of rotating massive stars. These disks produce large numbers of neutrinos and antineutrinos of electron flavor that can influence energetics and nucleosynthesis. Neutrinos are produced in sufficient numbers that, after they are emitted, they can undergo flavor transformation facilitated by the neutrino self interaction. We show that some of the neutrino flavor transformation phenomenology for accretion disks is similar to that of the supernova case, but also, we find the disk geometry lends itself to different transformation behaviors. These transformations strongly influence the nucleosynthetic outcome of disk winds.