Neutrino Oscillations form Cosmic Sources: a Nu Window to Cosmology

TL;DR

This paper explores how neutrino oscillations from cosmic sources can serve as a new observational window into cosmology by introducing a cosmological parameter that encodes cosmic history.

Contribution

It extends the standard neutrino oscillation framework to include effects of cosmic expansion, proposing a new parameter that links neutrino physics with cosmological measurements.

Findings

Introduction of a new cosmological parameter I in neutrino oscillation phase

Potential to measure I through neutrino observations to inform cosmological models

Discrimination among different cosmologies using neutrino oscillation data

Abstract

In this essay we extend the standard discussion of neutrino oscillations to astrophysical neutrinos propagating through expanding space. This extension introduces a new cosmological parameter $I$ into the oscillation phase. The new parameter records cosmic history in much the same manner as the redshift z or the apparent luminosity D_L. Measuring $I$ through neutrino oscillations could help determine cosmological parameters and discriminate among different cosmologies.