Exploring the Universe with Very High Energy Neutrinos

TL;DR

This paper reviews the discovery of high-energy neutrinos by IceCube, highlighting their significance in identifying cosmic ray sources, current research status, and future telescope plans in neutrino astronomy.

Contribution

It provides a comprehensive overview of astrophysical neutrino flux observations, source searches, and upcoming neutrino telescope projects, advancing high-energy universe exploration.

Findings

Detection of high-energy neutrino flux by IceCube

Progress in identifying cosmic neutrino sources

Future plans for neutrino telescope development

Abstract

With the discovery of a high-energy neutrino flux in the 0.1 PeV to PeV range from beyond the Earth's atmosphere with the IceCube detector, neutrino astronomy has achieved a major breakthrough in the exploration of the high-energy universe. One of the main goals is the identification and investigation of the still mysterious sources of the cosmic rays which are observed at Earth with energies up to several $10^5$ PeV. In addition to being smoking-gun evidence for the presence of cosmic rays in a specific object, neutrinos escape even dense environments and can reach us from distant places in the universe, thereby providing us with a unique tool to explore cosmic accelerators. This article summarizes our knowledge about the observed astrophysical neutrino flux and current status of the search for individual cosmic neutrino sources. At the end, it gives an overview of plans for future neutrino telescope projects.