PoS - Proceedings of Science
Volume 423 - 27th European Cosmic Ray Symposium (ECRS) - Dark Matter
A search for instanton-induced decay of super-heavy dark matter in the Pierre Auger Observatory data
O. Deligny*  on behalf of the Pierre Auger Collaboration
Full text: pdf
Pre-published on: February 15, 2023
Published on: December 14, 2023
Using data collected at the Pierre Auger Observatory, we search for signatures of instanton-induced processes that would provide evidence of super-heavy particles decaying in the Galactic halo. Such particles could have been produced sufficiently during the post-inflationary epoch to match the relic abundance of dark matter inferred today. The non-observation of these signatures allows us to probe the instanton strength and to derive a bound, the best ever obtained from instanton-mediated processes, on the reduced coupling constant of gauge interactions in the dark sector: $\alpha_X \lesssim 0.09$, for $10^{9} \lesssim M_X/{\rm GeV} < 10^{19}$.
DOI: https://doi.org/10.22323/1.423.0123
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