http://arxiv.org/abs/1808.04182
The origin of the first magnetic fields in the Universe is a standing problem in cosmology. Intergalactic magnetic field (IGMFs) may be an untapped window to the primeval Universe, providing further constrains on magnetogenesis. The helicity of IGMFs, in particular, is intrinsically connected to CP violation during baryogenesis. We demonstrate the feasibility of using ultra-high-energy cosmic rays (UHECRs) to constrain the helicity of IGMFs by performing simulations of cosmic-ray propagation in simple magnetic field configurations. We show that the first harmonic moments of the arrival distribution of UHECRs may be used to measure the absolute value of the helicity and its sign.
R. Batista and A. Saveliev
Tue, 14 Aug 18
10/65
Comments: 20 pages, 7 figures