Gravitational memory signal from neutrino self-interactions in supernova

Understand

Neutrinos with large self-interactions, arising from exchange of light scalars or vectors with mass $M_\phi\simeq 10{\rm MeV}$, can play a useful role in cosmology for structure formation and solving the Hubble tension.

• It has been proposed that large self-interactions of neutrinos may change the observed properties of supernova like the neutrino luminosity or the duration of the neutrino burst.
• In this paper, we study the gravitational wave memory signal arising from supernova neutrinos.
• Our results reveal that memory signal for self-interacting neutrinos are weaker than free-streaming neutrinos in the high frequency range.