Neutrinos from SN 1987A as a probe of physics beyond the standard model

by Damiano Fiorillo (Neils Bohr Institute)

Wednesday 25 Oct 2023, 11:30 → 12:30 Europe/Zurich

4/2-011 - TH common room (CERN)

The explosion of SN1987A is the only case in history in which a neutrino signal from a nearby supernova (SN) has been observed, and has shaped our understanding of the inner mechanisms of SNe. In addition, it has provided a unique window into the physics of weakly interacting, non-standard particles, which could have been emitted during the explosion altering the observed neutrino burst.

In this talk, we revisit the interpretation of SN1987A from a modern perspective. We compare up-to-date SN models with the legacy data, showing a general consistency in the time-integrated properties, while we point out that the inclusion of convection and updated neutrino-nucleon opacities in the current models builds up a tension in the signal duration.

We also provide a general overview of the information that can be gained from SN1987A on novel particles coupling to neutrinos. Our discussion encompasses both weakly interacting particles, which freely escape from the SN core, and strongly coupled particles, which lead to non-standard "secret" interactions among neutrinos.

Fiorillo_Supernovae.pdf