High Energy Physics - Phenomenology2017-12-07v1Cosmology and Nongalactic AstrophysicsHigh Energy Astrophysical PhenomenaHigh Energy Physics - ExperimentNuclear Experiment
We propose a new method to search for axion-like particles (ALPs) based on the gamma-rays produced concomitant with high-energy astrophysical neutrinos. The existence of high-energy neutrinos implies production of gamma-rays in the same sources. Photons can convert into ALPs in the sources' magnetic fields, and will travel as ALPs through extragalactic space. Back-conversion in the Milky Way's magnetic field leads to a diffuse anisotropic high-energy photon flux that existing and upcoming gamma-ray detectors, like HAWC, CTA, and LHAASO can detect. This method probes unexplored ALP parameter space, with LHAASO being realistically sensitive to couplings above 10−11GeV−1 and masses up to 3×10−6eV in ten years. Our technique also explores viable ALP dark matter parameter space.
@article{arxiv.1712.01839,
title = {Diffuse axion-like particle searches},
author = {Hendrik Vogel and Ranjan Laha and Manuel Meyer},
journal= {arXiv preprint arXiv:1712.01839},
year = {2017}
}