Large Neutrino Secret Interactions, Small Impact on Supernovae
Abstract
When hypothetical neutrino secret interactions (SI) are large, they form a fluid in a supernova (SN) core, flow out with sonic speed, and stream away as a fireball. For the first time, we tackle the complete dynamical problem and solve all steps, systematically using relativistic hydrodynamics. The impact on SN physics and the neutrino signal is remarkably small. For complete thermalization within the fireball, the observable spectrum changes in a way that is independent of the coupling strength. One potentially large effect beyond our study is quick deleptonization if SI violate lepton number. By present evidence, however, SN physics leaves open a large region in parameter space, where laboratory searches and future high-energy neutrino telescopes will probe SI.
Keywords
Cite
@article{arxiv.2307.15115,
title = {Large Neutrino Secret Interactions, Small Impact on Supernovae},
author = {Damiano F. G. Fiorillo and Georg Raffelt and Edoardo Vitagliano},
journal= {arXiv preprint arXiv:2307.15115},
year = {2024}
}
Comments
Version accepted in PRL, added Supplemental Material with derivation of fluid equations and comparison with previous literature; 5 pages, 3 figures, plus Supplemental Material