http://arxiv.org/abs/2106.06718
The presence of non-zero helicity in intergalactic magnetic fields is a smoking gun for their primordial origin since they have to be generated by processes that break CP invariance. As an experimental signature for the presence of helical magnetic fields, an estimator $Q$ based on the triple scalar product of the wave-vectors of photons generated in electromagnetic cascades from, e.g., TeV blazars, has been suggested previously. We propose to apply deep learning to helicity classification employing Convolutional Neural Networks and show that this method outperforms the $Q$ estimator.
N. Vago, I. Hameed and M. Kachelriess
Tue, 15 Jun 21
1/67
Comments: 14 pages, extended version of a contribution to the proceedings of the 37.th ICRC 2021