Neutrino propagation in binary neutron star mergers in presence of nonstandard interactions

TL;DR

This paper investigates how nonstandard interactions influence neutrino flavor evolution in neutron star merger environments, revealing significant modifications and complex conversion patterns with potential implications for nucleosynthesis.

Contribution

It demonstrates that nonstandard neutrino interactions can notably alter flavor evolution in neutron star mergers, even at low coupling values, and identifies new resonance phenomena.

Findings

Flavor evolution is significantly modified by nonstandard interactions.

Identification of I resonances as synchronized MSW phenomena.

Complex conversion patterns depend on nonstandard interaction parameters.

Abstract

We explore the impact of nonstandard interactions on neutrino propagation in accretion disks around binary neutron star mergers remnants. We show flavor evolution can be significantly modified even for values of the nonstandard couplings well below current bounds. We demonstrate the occurrence of I resonances as synchronized MSW phenomena and show that intricate conversion patterns might appear depending on the nonstandard interaction parameters. We discuss the possible implications for nucleosynthesis.