Report from the Multi-Messenger Working Group at UHECR-2014 Conference

TL;DR

This paper reviews recent results from major observatories on neutral particles like neutrinos and photons at ultra-high energies, highlighting their complementarity with charged cosmic ray measurements and analyzing current search status and future prospects.

Contribution

It provides a comprehensive overview of multi-messenger observations at ultra-high energies, including a cross-correlation analysis and future detection expectations.

Findings

Current status of neutral particle searches is summarized.

Cross-correlation analysis between different observatories is performed.

Expectations for future photon and neutrino detections are outlined.

Abstract

The IceCube, Pierre Auger and Telescope Array Collaborations have recently reported results on neutral particles (neutrons, photons and neutrinos) which complement the measurements on charged primary cosmic rays at ultra-high energy. The complementarity between these messengers and between their detections are outlined. The current status of their search is reviewed and a cross-correlation analysis between the available results is performed. The expectations for photon and neutrino detections in the near future are also presented.