Multimessenger Astronomy and New Neutrino Physics

TL;DR

This paper explores how multimessenger astronomical observations, especially from IceCube, can constrain new physics in the neutrino sector by analyzing neutrino sources and potential new interactions.

Contribution

It introduces a framework for using multimessenger data to set bounds on various new physics models involving neutrinos, dark matter, and astrophysical events.

Findings

Constraints on neutrino interactions from TXS 0506+056 observations

Limits on neutrinophilic dark matter from neutrino detections

Bounds on lepton-number-charged axion dark matter

Abstract

We discuss how to constrain new physics in the neutrino sector using multimessenger astronomical observations by the IceCube experiment. The information from time and direction coincidence with an identifiable source is used to improve experimental limits by constraining the mean free path of neutrinos from these sources. Over the coming years, IceCube is expected to detect neutrinos from a variety of neutrino-producing sources, and has already identified the Blazar TXS 0506+056 as a neutrino-producing source. We explore specific phenomenological models: additional neutrino interactions, neutrinophilic dark matter, and lepton-number-charged axion dark matter. For each new physics scenario, we interpret the observation of neutrinos from TXS 0506+056 as a constraint on the parameters of the new physics models. We also discuss mergers involving neutron stars and black holes, and how the detection of neutrinos coincident with these events could place bounds on the new physics models.