# Neutrino Intensity Interferometry: Measuring Proto-neutron Star Radii During Core-Collapse Supernovae

## TL;DR

This paper explores using neutrino intensity interferometry to measure proto-neutron star radii during supernovae, incorporating neutrino mass effects to determine the feasibility of extracting size information from galactic supernova signals.

## Contribution

It introduces a full wave-packet analysis including neutrino mass to assess the potential of neutrino interferometry for measuring PNS radii.

## Key findings

- Neutrinos from the next Galactic supernova can contain extractable PNS radius information.
- The analysis derives criteria for when the interferometry effect can be observed.
- Including neutrino mass in the analysis is crucial for accurate measurements.

## Abstract

Intensity interferometry is a technique that has been used to measure the size of sources ranging from the quark-gluon plasma formed in heavy ion collisions to the radii of stars. We investigate using the same technique to measure proto-neutron star (PNS) radii with the neutrino signal received from a core-collapse supernovae. Using a full wave-packet analysis, including the neutrino mass for the first time, we derive criteria where the effect can be expected to provide the desired signal, and find that neutrinos from the next Galactic supernova should contain extractable PNS radius information.